It takes four hours to go there and back.
往返要4个小时。
I can go there and back in half an hour.
我能在半小时内往返一次。
We have time go there and back before lunch.
我们到那里去一次,回来吃午饭还来得及。
My editor said,'no'. He asked me to go back to Mulberry Bend and stay there.
VOA: special.2010.08.01
And if I want to detach it, I just click and drag, and now I can go back and put different puzzle pieces there altogether.
另外,假如我想分离它,我只需要单击并拖动,然后就可以回到过去那个状态,再继续把不同的拼图放到一起。
Just go back as often as possible to this formula and work your way from there.
尽量多地复习这个公式,自己多推导几遍
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