他蹲下来，把手伸到了床垫下面。

He crouched down and reached under the mattress.

《柯林斯英汉双解大词典》

他蹲下来向篮子里窥视了一下。

He squatted down to peep into the basket.

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有一下他差点没抓住一根分枝，他得使劲摆手臂以稳定自己的身体，然后他蹲下来休息。

Once he almost missed a branch and had to swing his arms wildly before he could stabilize his body. Then he squatted down to rest.

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