??? iPhone 4S的視頻攝相頭也有了明顯的進(jìn)步。它可以拍攝1080p的高清視頻。視頻的每一幀都像照片一樣清晰，而且成像穩(wěn)定，這樣一來，我就沒必要總是帶著我的Flip Ultra HD高清攝相機(jī)了。有了iOS5系統(tǒng)，現(xiàn)在我們終于可以更直接地調(diào)用攝像頭：在鎖屏狀態(tài)下，只要按兩下Home鍵就可以喚醒相機(jī)。另外還可以把音量大小鍵當(dāng)成拍照快捷鍵。

????考慮到選擇的運(yùn)營商和居住地的不同，通話質(zhì)量和下載速度也會(huì)有些差異。比如美國電話電報(bào)公司（AT&T）在舊金山是出了名的不給力，但iPhone 4S在這里的表現(xiàn)還是可圈可點(diǎn)的。雖說通話質(zhì)量比起iPhone 4并沒有出現(xiàn)明顯的提高（比較好，但稱不上非常好），而且依然出現(xiàn)了通話中斷的情況，但是下載速度卻的確提高了。盡管iPhone 4S在技術(shù)上還算不上4G設(shè)備，但網(wǎng)頁和應(yīng)用的下載速度總的來說還是要快于iPhone 4，不過在該區(qū)域內(nèi)還是比不上威瑞森（Verizon）的4G網(wǎng)絡(luò)。

????Siri語音助手

????iPhone 4S最大的亮點(diǎn)在于它獨(dú)有的智能語音識別助手（Siri）?，F(xiàn)在看來，Siri還有一個(gè)最討喜的地方，那就是它有時(shí)會(huì)跟你玩一點(diǎn)冷幽默。我在拿到評測機(jī)之后才幾個(gè)小時(shí)，就問“她”（如果調(diào)到“英國英語”模式，則是個(gè)男版的“他”）愿不愿意嫁給我，結(jié)果Siri答道：“我才剛認(rèn)識你。”如果你追問下去，她就會(huì)說：“我的終端授權(quán)協(xié)議里不包含結(jié)婚這項(xiàng)服務(wù)。”而且如果問她一個(gè)20世紀(jì)最大的懸疑問題之一——“舔多少下才能舔到一個(gè)tootsie pop夾芯棒棒糖的芯？”她還會(huì)一本正經(jīng)地告訴你答案：3,481下。

????如果不惡搞的話，Siri也的確會(huì)出色地幫人解決一些實(shí)際的問題。比如，如果你問它最近的壽司店在哪里，它就會(huì)按遠(yuǎn)近程度列出一個(gè)清單；如果問她其中哪家最好，它就會(huì)根據(jù)網(wǎng)友的評價(jià)進(jìn)行篩選。另外通過Siri發(fā)短信或?qū)懕容^短的電子郵件也很方便，雖說我也注意到標(biāo)點(diǎn)符號并不是它的強(qiáng)項(xiàng)。另外Siri還可以幫忙安排預(yù)約，甚至避免約會(huì)撞車。我以前從沒有在iPhone上用過日歷應(yīng)用，不過現(xiàn)在由于有了Siri，我開始使用日歷應(yīng)用了。

????不過Siri也不是完美無缺。蘋果公司稱這款應(yīng)用現(xiàn)在仍然是測試版，我們在評測中也暴露出了這一點(diǎn)。Siri有的時(shí)候聽不懂我在說什么，哪怕在很安靜的環(huán)境下也是如此。蘋果公司表示，等到Siri熟悉了用戶的說話習(xí)慣之后，這種現(xiàn)象就會(huì)改觀。而且它的邏輯也不是完全不會(huì)出錯(cuò)的。有一次我叫它“給我爸爸打電話。”Siri列出了一個(gè)選項(xiàng)：“你是要打爸爸的工作電話、爸爸的家庭電話，還是打給（我的同事）亞當(dāng)?拉辛斯基?！保ㄎ液蛠啴?dāng)可沒有親戚關(guān)系。）

????用戶很快就會(huì)發(fā)現(xiàn)Siri的局限性，這也挺讓人沮喪。因?yàn)镾iri的確會(huì)使某些任務(wù)變得簡單得多，這樣一來人們就會(huì)想讓它做更多的事，或者想弄清楚它究竟能做多少工作。Siri可以幫忙查找電影院，但查不到電影的放映時(shí)間。它可以幫忙發(fā)短信，但是不能添加聯(lián)系人。Siri的許多缺點(diǎn)未來都會(huì)得到修正。但現(xiàn)在它能做的事還不是太多，這還是挺遺憾的。

????最后

????iPhone 4S是不是值得購買呢？這要看情況。

????我能看出為什么Siri對消費(fèi)者來說有很大的吸引力。蘋果為我們展現(xiàn)了一個(gè)誘人的前景，Siri為我們提供了一個(gè)非常簡單的用戶界面，有了Siri，許多與iPhone的互動(dòng)都可以通過語音來完成。只要是它能做到的事，它都做得很好。（比如現(xiàn)在用Siri搜索餐館、安排預(yù)約都是小菜一碟。）但Siri顯然還處于早期階段，在執(zhí)行任何任務(wù)的時(shí)候，它都可能出現(xiàn)許多狀況，跟“老式的”的觸屏手機(jī)相差無己。它給人的感覺雖然是一項(xiàng)智能的尖端技術(shù)，但仍然處在萌芽期，短期之內(nèi)難成氣候。

????如果你是從第一款iPhone、iPhone 3G或iPhone 3GS升級過來的，那么iPhone 4S的運(yùn)行速度和高質(zhì)量的攝像頭會(huì)讓你十分享受。不過如果你已經(jīng)有了一臺(tái)iPhone 4，那么升級到iPhone 4S會(huì)不會(huì)讓你感到那么興奮，就比較難以確定了，尤其是如果你今年年初剛買了一臺(tái)威瑞森版iPhone 4的話。因?yàn)閕Phone 4S的變化不夠吸引人，感覺有點(diǎn)換湯不換藥，也許是因?yàn)閕Phone 4一開始用起來就沒什么可挑剔的。不管怎樣，iPhone 4S還是有很多討人喜歡的地方，哪怕它所做的改進(jìn)只是漸進(jìn)性的，而不是革命性的。

????譯者：樸成奎

????The video camera got a bump, too. Now it captures video in 1080p. Video is every bit as clear as stills, and thanks to image stabilization, I don't need to carry my Flip Ultra HD around anymore. With iOS5, you finally have more direct access to the camera: double tap the home button when the phone is off, and a camera icon appears. You can also press the volume up button to snap shots.

????Depending on which mobile carrier you're with and where you live, you'll get different results with call quality and download speeds. In San Francisco, where AT&T is notoriously spotty, the 4S did fine. We didn't notice a huge improvement in call quality (good, not great), and we still experienced dropped calls. Download speeds fared better. While the 4S isn't technically a 4G-labeled device, downloads of web sites and apps were generally quicker than the iPhone 4, though not as fast as Verizon's 4G network in the area.

????A Siri-ous voice assistant

????Much has already been made of Siri, the voice recognition "intelligent assistant" that's exclusive to the 4S. It seems one of her (of if you switch to the English UK option, his) best assets is an especially dry sense of humor. Ask Siri to marry you as I did mere hours after receiving the phone to review, and it'll say that it hardly knows you. Push the subject, and it'll claim that her "End User Licensing Agreement does not cover marriage." And if you ask it about one of the 20th century's biggest mysteries -- "how many licks does it take to get to the center of a tootsie pop?" -- you'll get an answer (3,481).

????When you're not kidding around, Siri's also good at performing some practical tasks. Ask it where the nearest sushi place is, and it'll present a list of sushi restaurants in descending order based on proximity; ask it which one is the best, and it'll sort those nearby restaurants by rating. Siri is also handy with basic text message dictation and short emails, though I've noticed punctuation isn't its strong suit. Likewise, scheduling appointments and even avoiding double-bookings, is much easier. I didn't use the calendar app on the iPhone, but because of Siri, I do now.

????But Siri isn't without its quirks. Apple says the app is still in beta, and our experiences bore that out. Siri sometimes has problems understanding what I'm saying, even if I'm in a quiet setting. Apple says that situation will improve as Siri adapts to the way you speak. Its logic isn't entirely foolproof, either. When I asked it to "call dad," it presented me with three dialing options: "Dad work, Dad home, or [colleague] Adam Lashinsky." (For the record, Adam and I aren't related.)

????You also run into its limitations quickly, which will also be frustrating. Because Siri makes certain tasks much easier, you try to push the boundaries and figure out just how many tasks you can offload. You can look up movie theaters, but you can't look up show times. You can send texts, though you can't add contacts. Many of Siri's shortcomings ought to be fixed in the future. It's just a shame you can't do more with it now.

????In the end

????Whether the iPhone 4S warrants a purchase all depends.

????I can see why Siri is a big draw. Apple's offering a tantalizing future: a simple, streamlined user interface where many interactions with the iPhone are conducted via voice. And what it does do, it often does well. (Looking up restaurants and booking appointments are a breeze now.) But Siri is clearly still in its early days, and for every task it can do, you'll run into just as many situations where you're better off navigating the "old-fashioned" touchscreen way. It feels like a smart, nascent piece of technology that can't grow up soon enough.

????If you own the original iPhone, 3G, or 3GS, you'll enjoy the speed gains and quality camera. If you own an iPhone 4, the upgrade path is less certain, especially if you just bought a Verizon iPhone earlier this year. The improvements will seem far less dramatic and more iterative, probably because using the iPhone 4 never felt like a drag to begin with. Either way, there's a lot to like, even if the changes are evolutionary, not revolutionary.