Dinaphthylmethane
二萘甲烷
??? 情景例句
Time moved at a snail's pace before the holiday.
假期之前時間過得非常緩慢。
Do you mind if I turn off the light?
我把燈關了，好嗎？
The line's busy. I'll try again later.
電話占線，過一會我再打。