Tertiarium
特蒂钖铅焊料
🗣️ 情景例句
Mr Wang, I'd like you to meet my brother, Haitian.
王先生，我想请你见见我弟弟，海天。
You are still thinking about a Ph.D., aren't you?
你还是想学成博士，是吗？
What time will the next train leave?
下一班火车什么时候开？