Pdms
等离子体解吸质谱法
🗣️ 情景例句
I don't know what I would do without you.
我真不知道没有你们我怎么办。
I wrote 9 books.
我写了九本书。
Of course. You may find these rather expensive.
当然。不过这些衣服你可能觉得相当贵。