Trifluoride
三氟化物
🗣️ 情景例句
Please tell me about your working background.
请告诉我你的工作背景。
He that will have a hare to breakfast must hunt overnight.
早餐想吃野兔肉，头晚就须去捕捉。
Please fill in the blanks when you are answering the test questions.
你考试时请把那些空填上。