Mif
[化] 巨噬细胞抑制因子
🗣️ 情景例句
That's very nice of you, but I really can't.
你太客气了，可我真的非走不可。
I asked him to lend me a book , but he wouldn't.
我请他把书借给我，但是他不肯。
We can offer you this in different levels of quality.
这产品我们有三种不同等级的品质。