Basofor
[化] 沉淀硫酸鋇
??? 情景例句
I couldn't be more sure, Susan.
我再確定不過了， Susan。
You go first. I'll catch up later.
你先走，我隨后就到。
A bird had snatched up the snake from the ground and then dropped it on to the wires.
一只鳥把蛇從地上抓起來，然后把它扔到了電線上。