Naphthoxanthene
苯并夾氧雜蒽
??? 情景例句
It was not until yesterday that I noticed it.
我一直到昨天才注意到它。
Look not for musk in dog's kennel.
狗嘴里吐不出象牙。
He covered himself with a quilt.
他給自己蓋上一條被。