Bioxindol
異靛藍(lán)
??? 情景例句
using as many letters as possible.
盡可能多用字母，
I owe you one.
我欠你一個(gè)人情。
Yes, I see. How can they get rid of waste water in this way? What a terrible colour the sea is now! It looks as if our class won't be able to bathe at all.
是的，我看見了。他們怎么能這樣排放廢水呢？海水的顏色多么可怕呀！看來我們班同學(xué)根本不能在這里游泳。