__________ is the act performed by or resulting from saying something; it is the consequence of, or the change brought about by the utterance.

备用的主要通风机，必须在______min中内开动

All people, whether they be rich or poor, strong or weak, privileged or deprived，are interdependent, and _______ the common task of seeking to achieve mankinds full potential

Many boys enjoy _______ football, basketball or baseball

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

下列选项能反映矿井通风难易程度指标的是__________。

It advises artists to ________ from smoking or eating while painting, to use face masks and to provide adequate ventilation (通风) by means of an extractor fan

带电工具房进行室内通风时，应在_____的天气进行，并且室外的相对湿度不得高于_____。通风结束后，应立即检查室内的_____，并加以调控。

29．__________ when you are on the bus or bike．

太重的油漆桶应将桶底垫高_____以上，使之通风。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

现代室内设计最根本的是要解决________和通风的问题。