Dopt
二羟苯丙氨酸
🗣️ 情景例句
What did you learn at school today?
你今天在学校学了什么？
A chain is no stronger than its weakest link.
链条的坚固程度取决于它最薄弱的环节。
I want to take some books to the classroom. Could you help me, please?
我想把一些书拿到教室里，你能帮个忙吗？