Hn2
[化] 氮芥; 二·甲基胺; 二氯乙基·甲基胺
??? 情景例句
She liked Pete, and they went to dances together.
她喜歡Pete， 他們也一起去跳舞。
Who would you name as the greatest poet of our time?
你認(rèn)為當(dāng)代最偉大的詩人是誰？
What you need is just rest.
你需要的就是休息。