温床

The city is a hotbed of crime.

这个城市是犯罪的温。

Air-conditioning ducts create a perfect breeding ground for Legionnaire's disease bacteria.

空调系统的输送管则是军团的绝佳温。

"Modern cities are a window of modern civilization and, at the same time, a hotbed of crime."

"现代城市是现代文明的窗口,同时又是犯罪的温。"

The ichneumon wasp paralyses its prey without killing it and lays its larva inside this convenient source of fresh meat, to eat it slowly alive.

姬蜂，黄蜂使猎物麻痹而不是杀死，并将它的活体作为虫的温，并慢慢的从的活体吸收养分。