Laevoisometer
左旋性同质异构体
🗣️ 情景例句
but Richard Stewart is here
但Richard Stewart正在这儿，
Use a book as a bee does flowers.
读书如蜜蜂采花，吸取其中之精华。
He can't make it today. He has to stay at home.
他今天不行了。他得呆在家里。