Farvitron
线振质谱计
🗣️ 情景例句
I want to send this letter to China, by air mail.
我想把这封信航空邮到中国。
Please forgive me.I didn't mean to start an argument.
请原谅我。我没开始争论的意思。
He grasped both my hands.
他紧握住我的双手。