Nitrosulphuric
硝酸和硫酸混合而成的
??? 情景例句
Practice tenses as much as possible.
操練各種時(shí)態(tài)。
I was in the hospital for several weeks.
我在醫(yī)院里住了幾個(gè)星期了。
Will you pick me up at my place?
你能到我的住處來接我嗎？