The smoke issuing from the chimneys is polluting the air of this zone.

从烟囱里冒出的烟正在污染这个地区的空气。

youdao

The zone model could still be used to simulate the smoke movement in large spaces.

计算结果和试验结果对比表明 ，在大空间内仍可利用火灾区域模拟方法计算烟气的运动。

youdao

Here is a Smoke Free Zone.

此处为禁烟区。

youdao

Here is a Smoke Free Zone.

此处为禁烟区。

youdao