back down後面加什麼

They make threats but back down at the first sniff of trouble.

他們起先氣勢洶洶，但一看情形不妙立刻軟了下來。

I'll take you back down to the valley.

我會帶你返回下面的`山谷裡。

His determination and refusal to back down had won the day

他的堅定和拒不退讓使他贏得了勝利。

It's too late to back down now

現在打退堂鼓已經太晚了。

I drove back down the highway at normal speed

我以正常車速沿公路返回。