before doing的例句

1、You came to China in America before doing?

2、Must I clean my face before doing the steam?

3、 I would think twice before doing that.

We consider it quite necessary to look into the case Before doing anything else.

我们认为在采取任何其他行动之前，先深入调查这个案子是十分必要的。

Before doing matching, the system extracted strong feature points using Canny edges detection.

在匹配前，通过Canny边缘检测来提取强特征点以供立体匹配。

Do you know the difference between carbon audit and energy audit before doing this questionnaire?

在进行此问卷之前，你是否了解能源审核及碳审计不同之处？