壞事滋生的溫床
把「那塊地讓數量變多」這件事整個搬到情境上，動物換成犯罪、謠言、細菌、不滿。連句型都沿用下來：a breeding ground for＋名詞。差別只在於，這裡長出來的幾乎都是沒有人想要的東西，所以這句話一說出口就帶著警告。
noun · B2
A place, or a set of conditions, in which something bad or harmful starts easily and then grows and spreads fast.
溫床
核心畫面
One way to hold this phrase is to picture a patch of land where numbers go up. Animals do not scatter to have their young; they come back to one place, and by the end of the season there are far more of them than there were at the start. The useful part of that picture is not that something is present there. It is that the place itself is doing the multiplying — which is why English can point at a street, an office or a comment thread and use exactly the same words.
「breeding ground」可以想成一塊「數量會變多的地」。動物不是隨便找地方生小孩，而是特地回到同一塊地；一…更多收起
「breeding ground」可以想成一塊「數量會變多的地」。動物不是隨便找地方生小孩，而是特地回到同一塊地；一季過去，那裡的數量就比原本多了好幾倍。這個畫面真正有用的地方，不是「那裡有東西」，而是「那塊地本身讓東西一直長出來」。也正因為這樣，英文可以指著一條街、一間辦公室、一個留言區，用一模一樣的字。From the picture
Also in this word
noun · B1
An area that animals, birds, or fish go to at a certain time of year in order to mate and have their young.
繁殖地