Dibenzphenanthrene
二苯并菲
🗣️ 情景例句
Oh, Somebody's at the door. I have to go.
哦，有人来了，我得去开门。
The color from my red socks ran because I used hot water in the wash.
由于用热水洗，所以红袜子的颜色渗出来了。
Before? After? said the doctor.
“饭前？饭后？”医生说。