two one three

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the done thing───做过的事

at one time───曾经，一度；同时

be one thing───是一回事

for one thing───首先；一则

none the───一点也不

page three───第三页

plane tree───n.悬铃树

reel of three───三卷

rule of three───[数]比例法，三分律

There were three questions. The first two were relatively easy but the third one was hard.───有三个问题。头两个相对容易，第三个困难。

I'll say 'One, two, three, go!' as a signal for you to start.───我喊“一、二、三，开始！”作为你开始的信号。

Five, four, three, two, one, zero... We have lift-off.───五、四、三、二、一、零… 我们升空了。