They make threats but back down at the first sniff of trouble.
他们起先气势汹汹，但一看情形不妙立刻软了下来。
They taught us how to strip down a car engine and put it back together again.
他们教我们拆卸、安装汽车引擎。
Back at the penthouse, he insisted they sit down to read aloud.
回到公寓，他坚持让他们坐下来大声朗读。
They hardly ever go back down.
很难瘦回来。
As they walked down the back steps into the dark yard, Ginny took his hand.
他们走下屋后的台阶进入后院，金妮抓住了他的手。
When they came down again, Mark was very glad to be back safely.
当他们着陆后马克很高兴能够安全返回地面。
Even when they were well down the street, Nora didn't look back.
他们使上了马路，劳拉没有回头看一眼。
After they came down, we ate the litchis as we headed back to the boat.
等到他们下地以后，我们大家一面吃荔枝，一面走回船上去。
They finally had to back down on their unreasonable demands.
他们终于不得不放弃不合理的要求。
They followed the officer back down the boulevard and down a side street.
他们跟随那个官员走过主街，进入到一条侧道。
They drove back, and at 6.15 sat down to dine.
他们乘车往回赶，6点1刻时才坐下来吃饭。
Once all those chemicals come back down to the ground, they can cause problems too.
一旦那些化学品落回地面，他们同样可以造成问题。
Then they shoot back down and wind through a 270-degree spiral.
在螺旋波里，轨道则是逐渐弯曲，所以密度变大的区域是曲线状。
Then they shoot back down and wind through a 270-degree spiral.
在螺旋波里，轨道则是逐渐弯曲，所以密度变大的区域是曲线状。
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