Souring
v. 变酸；发酵；变质（sour的现在分词）
🗣️ 情景例句
Mr. Carlson will love them.
Carlson先生会喜欢的。
The rotten apple injuries its neighbours.
一只死老鼠，弄赃粥一锅。
When several elephants are being trained at one time,
几只象同时训练时，