Arlef
氟灭酸; 甲灭酸
🗣️ 情景例句
How many stops will the train make on the way?
路上火车停几站？
It is my pleasure to introduce the keynote speaker for today.
我很荣幸地介绍今天的主讲人。
Some of them were as big as marbles.
有的钻石像玻璃球那么大。