Tachography
血流速度描记法
🗣️ 情景例句
Have you ever been to Nanjing?
你曾去过南京吗？
Excuse me I don't know.
对不起我不知道。
Yes, I am. Please be careful, Meimei. Don't go too high.
是的，我扶着呢，小心点儿，梅梅。不要上得太高！