Acridone
吖啶酮
🗣️ 情景例句
Sam, this is Susan. Sam
我是Susan。
Kept waving to her mother until the train was out of sight.
不断地冲她的母亲挥手，直到火车驶出了视线。
It involves a lot of hard work.
那需要很多的辛勤工作。