With every stride, runners hit the ground with up to five times their body-weight.

赛跑者的每一步都以5倍于他们体重的力量撞击地面。

《柯林斯英汉双解大词典》

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It felt strange to run and not feel his feet when they hit the ground.

VOA: special.2010.05.01

We want to know, as you can tell-- our concern is where does the car hit the ground?

我们想知道,你们也能算出来,车将在哪一点落到地面

耶鲁公开课 - 基础物理课程节选

you can hit the ground running, as we say.

也就是说，你可以立刻进入状态。

写推荐书的人 - SpeakingMax英语口语达人

It also allowed me to hit the ground running after I, indeed, was let go.

FORBES: How I Lost My Job, But Not My Dignity

When the piece of wood finally hit the ground, Ms. Teigen breathed a sigh of relief.

WSJ: The Scent of a Lumberjack

This is a fantastic opportunity, and I can't wait to hit the ground running in January.

ENGADGET: Go Daddy hires former Microsoft and Yahoo exec Blake Irving as next CEO