When you need one of those values, you specify it by using its name.

然后，在需要这些值中的某一个值时，可以通过它的名称来指定它。

youdao

When its scanners find a word they can't read, they automatically turn it into a CAPTCHA that gets exported to a website in need of one.

当扫描仪发现无法识别的单词时，它就自动地将其转变为验证码，并将其发布到网页上需要的位置。

youdao

However, we only have one main thread and one call-stack, so in case there is another request being served when the said file is read, its callback will need to wait for the stack to become empty.

尽管如此，我们只有一个主线程加一个调用栈，所以为避免在读取那个文件时又去处理另一个请求，回调函数需要等待调用栈变空。

youdao

Google has said one goal of its Glass project is to make technology available when users need it but unobtrusive when they don't.

CNN: Lawmaker: Google Glass and driving don't mix

They have to be turned over when the demanding branch can articulate a compelling need for the information to fulfill one of its own constitutional functions -- a need that outweighs the executive branch's interest in confidentiality.

CNN: Why contempt case against Holder may be doomed

The BTM8 is begging to be taken on your next picnic thanks to its carrying handle, while the BTM5 is palmable orb with one up-firing speaker for when you need a speakerphone in a pinch.

ENGADGET