Bsa
abbr. 农业科学学士（Bachelor of Science in Agriculture）；美国童子军（Boy Scouts of America）；牛血清蛋白（Bull Serum Albumin）
🗣️ 情景例句
What did they say?
他们说什么?
That's why he is now concentrating on conversation at a language school near his home.
这就是他在他家附近的一所语言学校专攻口语的原因。
Mr. Green doesn't climb down the chimney. He waits until the children are asleep.
格林先生不从烟囱上爬下来，他等候孩子们都睡熟。