Allelotrope
稳变异构体
🗣️ 情景例句
Nice talking to you. See you around.
和你谈得很愉快。 回头见。
You shouldn't refuse the children's request.
拒绝孩子们的恳求是件不好的事。
Who was second? Who was third?
谁是第二？谁是第三？