Diasterane
重排甾烷
🗣️ 情景例句
It was a pleasure having you. Please come again.
和你在一起我们非常荣幸，请有空常来。
Who would you name as the greatest poet of our time?
你认为当代最伟大的诗人是谁？
Follow your teacher's instructions.
按照他/她告诉你的去做。