1·For a start, they make air cleaner for us to breathe.
首先，它们使我们呼吸的空气更清新。
2·Those green trees prevent desertification, make the air cleaner and protect people from the hot sun.
那些绿色的树木防止荒漠化，使空气更清新，保护人们免受烈日的暴晒。
3·Install air cleaner housing lid.
安装空气滤清器壳盖。
4·Replace engine air cleaner element.
更换引擎空气清洁器组件。
5·When you cannot put an air cleaner in each room.
当你不能把一个空气净化器在每个房间。
6·Fit air cleaner housing cover and filter element.
安装空气滤清器壳罩和滤芯。
7·Filter elements; air cleaner; assembly; and, methods.
过滤器元件；空气清洁器；组件；和方法。
8·Streets will be less congested, the air cleaner, and rent lower.
街道将不再那么拥挤；空气会更清新；房租会更便宜。
9·Conclusion electronic air cleaner is an effective air cleaner device.
结论电子空气净化机是一种有效的空气净化设备。
10·Objective To evaluate purification efficacy of electronic air cleaner.
目的了解电子空气净化机净化空气效果。