我们为了生存必须要吃东西。

We have to eat to live.

youdao

要在街头生活中得以生存，你就必须要知道你所住的街上和居民区中发生的所有事情。

Just to survive street life one must be aware of all that is going on in the streets and neighborhood lived in.

youdao

为了在那里生存，美国宇航局喷气推进实验室设计的气球必须要经受得起零下180度左右的气温。

To survive there, a balloon, designed by Nasa's Jet Propulsion Laboratory, would have to withstand temperatures around -180c.

youdao

But now that we're here,we're in a position perhaps to raise the question, should we be asking what it takes to survive?

现在我们必须想要提出的问题应该是，要怎样才能生存？

耶鲁公开课 - 死亡课程节选

If there are three possibilities--dead, alive, or suspended-- to be dead, we could still say you've got to be broken, incapable of P-functioning.

如果有三种可能，生存，死亡或者假死-,要死亡的话，你必须是被破坏的状态，无法拥有人格功能性。

耶鲁公开课 - 死亡课程节选