Abrine
红豆碱, N-甲基色氨酸
🗣️ 情景例句
You'll learn a lot.
会增长不少见识。
At 6 o'clock sharp.
6点。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。