施工前表面必须涂有适当底漆。

The surfaces must be treated with a suitable primer before application.

youdao

小圆片的前表面应与胶合板的表面平齐。

The front of the disk is flush with the surface of the board.

youdao

这些名词所共有的中心意思是。头部的前表面。

The central meaning Shared by these nouns is. The front surface of the head.

youdao

And the appearance of conventionality is supported by the opening words of the book in his dedicatory letter.

且常规的表面,有本书开头前几个字正面背书,就在他的献辞中。

耶鲁公开课 - 政治哲学导论课程节选