Occasionally air-conditioning units failed and it was then that fatalities occurred.

偶尔空调机组会出现故障，这时就会发生死亡事故。

youdao

The mobile power supply and air-conditioning units are mounted on trailers.

移动电源和空调设备安装在拖车上。

youdao

No satellite dish is on the roof, no air-conditioning units are evident.

建筑屋顶上没有装卫星天线接收器，也不见空调箱。

youdao

They outfit their three technicians' vehicles with five-gallon water jugs and check that the air-conditioning units are always functioning properly.

WSJ: Login/Register to set your edition

Mold in homes hasn't been tracked historically, but certain building practices like making homes more airtight, installing air-conditioning units and using materials like drywall and oriented strand board, an engineered wood product have made homes more conducive to mold growth than they were in the past, says Jeffrey May, principal scientist at May Indoor Air Investigations based in Tyngsborough, Mass.

WSJ: The $500,000 Housecleaning

Plants release moisture into the air alleviating the dry atmosphere generated by air-conditioning and central heating units, as well as computers.

CNN: Office foliage for feel good factor