Naphthophenanthrene
二苯并蒽
🗣️ 情景例句
I'll try to explain.
我会尽量给你解释。
All measurements of each case must not exceed 1.5m*1m*1m.
每只木箱体积不应超过1。5m*1m*1m。
Here!Put it on this chair.
放在这儿。把它放在这把椅子上。