Pentafluorinated
五氟化的
🗣️ 情景例句
Tell her I'll call her right back.
告诉她我会马上给她回电话的。
What's your impression of the United States?
你对美国的印象如何？
One of the boys is English. His name is Jim.
有一个男孩是英国人，他的名字叫吉姆。