用 do sth by doing sth和do sth by mistake 造句

如题所述

The man helped her by picking up her bag.
那人帮她捡起了包。
I took my brother's pen by mistake.
我不小心错拿了我哥哥的钢笔。
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第1个回答  2010-08-27
Finally,I realise my dream by working hard.

最终,我通过不懈的努力实现了梦想。

第二个楼上造的算标准的了吧
第2个回答  2012-05-16
by+doing
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