leg up

n. (对上马或跨跃障碍时的)帮助, 抢先起步

例句与用法：

If you give me a leg up, I can get over the wall.

如果你帮我一把，我便能翻过这堵墙。

The two say most people think top scholars have a leg up on life. In fact, Denny said, "they seem to be stubbing their toes on life's vicissitudes, just like we all do."

二人说大多数人认为一流学者的生活优于常人。其实，丹尼说，“他们似乎就和我们一样，在坎坷人生中遭遇挫折。”

She only got that job because her uncle gave her a leg up.

她是在她叔叔的帮助下才到那份工作的。