这是有必要的，因为全日制学生每周可能要读几百页材料。
This is necessary because full-time students probably have to read several hundred pages every week.
富人没有必要储蓄，因为有金融市场正为其代劳。
The rich need not save because financial markets are doing their savings for them.
有必要的时候你才会说，因为你知道：当他们想听的时候，他们必然会听。
You speak when it’s time to speak and know that those who need to hear will hear when they’re ready.
当然有必要，最终采取行动，因为你将永远不会得到任何东西，除非你在生活中采取行动。
Of course there is a need, eventually, to take action, as you will never get anything in life unless you take action.
当然这不是因为我有必要告诉你什么，其实我懂的事你也都懂，这一点那个晚上在家中我就跟你说过了。
Not that I have any occasion to tell you anything, for you know everything I know - as I told you at home the other night.
你有必要因为害怕窃贼而不在公共场所使用iPad吗？
Should fear of theft keep you from using your iPad in public?
我认为我们学英语是有必要的，因为它非常有用。
I think it necessary for us to learn English because it's very useful.
但是因为这个现象发生了不止一次，我认为有必要提上一笔。
But because it did happen more than once I felt that it was important to mention.
i想通这是一个必要性，因为他们有更多的困难与跳转。
I figured this was a necessity, as they were have more difficulty with the jump.
但他不会花太多时间之外，除非它是必要的，更不用说有外遇，因为他经常爱给他的妻子和孩子。
But he will not spend too much time outside unless it is necessary, let alone have an affair because his constant love has give to his wife and child.
保持必要的礼貌，因为不只是你一个人有问题要问。
有了这种认识和思想准备也是非常必要的，因为这样会使你的生活增加欢乐而减少痛苦。
This thought is absolutely necessary to prepare you to experience less pain and more joy in your journey of life.
有一段时间，一名女子是必要的，因为一名牧师。
There was a time when a singing woman was as necessary as a priest.
有必要的时候你才会说，因为你知道：当他们想听的时候，他们必然会听。
You speak when it's time to speak and know that those who need to hear will hear when they're ready.
有必要的时候你才会说，因为你知道：当他们想听的时候，他们必然会听。
You speak when it's time to speak and know that those who need to hear will hear when they're ready.
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