Its value can change over its lifetime, but it always holds some value.
在生存期内变量的值可以更改，但变量总是存储某些值。
As you plan your application, keep in mind its security requirements over its lifetime.
当您规划应用程序时，应牢记应用程序生存期内的安全要求。
Over its lifetime, the project has accumulated many documents, most of them in Word format.
经历了这几年，该项目已经积累了许多文档，大多数都是word格式。
Hard labor at low pay over a lifetime takes its toll on a person.
一辈子拿着低薪从事着艰苦的工作，是很折磨人的。
Music is experienced over a lifetime, but all of its pleasures are momentary.
听音乐是一辈子的事情，但是所有的愉快就在那音乐瞬间的感受。
Music is experienced over a lifetime, but all of its pleasures are momentary.
听音乐是一辈子的事情，但是所有的愉快就在那音乐瞬间的感受。
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