Lactasin
[化] 乳酶生
🗣️ 情景例句
I have a ticket, I know.
我知道我有车票。
I asked him to leave immediately, but he wouldn't.
我请他马上离开，但是他不肯。
We were so excited, my brother and I, that we did not get to sleep until very late.
我们太激动，以至于我和我弟到很晚才睡得着。