Tetrapion
四氟丙酸钠
🗣️ 情景例句
I always wanted to travel to Europe but I was afraid that language would be a problem.
我总想去欧洲旅游，但我又怕语言是个问题。
A thief is a thief, whether he steals a diamond or a cucumber.
偷多偷少都是贼。
Mr.Hart has trained his daughter for years.
哈特先生训练她的女儿已经多年了，