breeding-ground
n
1 place where wild animals go to produce their young (野生动物的)繁殖地
Some birds fly south to find good breeding-grounds. 有些鸟飞到南方去寻找适合产卵的地方.
2 (fig 比喻) place where sth (usu harmful) can develop 某事物(通常指有害事物)的滋生地
Damp, dirty houses are a breeding ground for disease. 房屋潮湿、肮脏可滋生疾病.