We were crawling around on all fours.

我们匍匐着四处爬行。

She crawled on all fours over to the window.

她匍匐着爬到窗边。

The horse jumped the stream and landed on all fours.

那匹马跳过小溪，四脚落地。

Get down on all fours and look around.

四肢触地，模仿狗狗的样子来观察四周。

He went up the steep path on all fours.

他手足并用地攀爬上陡峭的小路。