Csf
[化] 集落刺激因子
??? 情景例句
I'm sure he misses Grandma on a day like this.
我想在這樣的日子祖父一定會思念祖母。
That's a tough question to answer.
那是一個很難回答的問題。
'Do not touch the exhibits. Some of them are dangerous!'
“切勿觸摸展品，某些展品有危險！”