Naphthothiazines
三氮雜蒽
??? 情景例句
They had no way to communicate directly with Kurt.
他們無法和庫爾特直接聯系。
Slowly, mountains are worn away by the wind.
山體逐漸被風化了。
Do you want the large size or the small size?
您要大號的還是小號的？