可在你出现之前，我推了自己12年。

I wheeled myself for twelve years before you came along.

youdao

在你出现之前，我已经推了自己十二年了。我怀疑我的胳膊已经忘记怎样转动车轮了吧。

I wheeled myself for twelve years before you came along; I doubt that my arms have forgotten how.

youdao

贝拉，在你出现之前，我的人生就像没有月光的夜，异常黑暗，但仍有繁星点点指出生命之光和生活的意义。

Before you, Bella, my life was like a moonless night. Very dark, but there were stars, points of light and reason.

youdao

It predicts that the best timing is when the conditioned stimulus, which is the signal, comes before the unconditioned stimulus, which is what you have to prepare for.

它预测，最佳的时机,莫过于作为信号的条件刺激，出现在需要你做准备的，非条件刺激之前。

耶鲁公开课 - 心理学导论课程节选

You have to practice before it happens.

你要在机会出现之前练习。

想成为明星吗？ - SpeakingMax英语口语达人