There is no knowing when he can finish the book.
无法知道他何时才能写完这本书。
Using them well (or knowing when not to use them) is a skill.
使用好模式（或知道什么时候不使用模式）是一项技能。
The key is knowing when to follow the rules and when to break them.
关键是要知道何时该循规蹈矩，何时需破旧立新。
Part of effective time management is knowing when to shut things down.
高效时间管理的一部分，就是知道什么时候关掉它们。
It's not knowing when to finish something.
是不知道什么时候该结束一件事。
There is no knowing when we shall meet again.
不知道何时我们再相见。
Love means knowing when you need to say sorry.
爱是你知道啥时候需要主动道歉。
There is no knowing when we shall finish this task .
不知何时我们能完成这项任务。
The trick is knowing when that advice is worth acting on.
问题关键在于要知道这些意见什么时候能起作用。
Wisdom means knowing when and where to do the right thing.
智慧意味着懂得何时何地去做合适的事。
Knowledge is knowing what to say. Wisdom is knowing when to say it.
知识是知道该说什么。智慧是知道该什么时候说。
This leads to the problem of not knowing when the process is fully stopped.
这就导致了不知道进程何时彻底停止这种问题。
Success in business is simply a matter of knowing when to take a chance.
商业上的成功就在于把握时机。
Persistence is important. However, knowing when it's time to move on is also crucial.
坚持不懈很重要，然而懂得何时继续前进也很关键。
Design is Knowing When to Stop.
设计就是懂得何时结束。
Knowing when to jump is one problem.
知道何时跳出现有职业是一个问题。
Knowing when to say "I love you" is one of life's great puzzles.
把握何时说“我爱你”的时机是人生的一大难题。
Knowing when to leave may beThe smartest thing anyone can learn, go!
知道何时应离开是人能学会的最聪慧的一件事，走吧！
It was no way to live never knowing when one of these storms would break.
这样的日子可怎么熬？总是担惊受怕，不知道什么时候这样的暴风雨又会袭来。
It was no way to live never knowing when one of these storms would break.
这样的日子可怎么熬？总是担惊受怕，不知道什么时候这样的暴风雨又会袭来。
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