Mesulphen
二甲基硫蒽
🗣️ 情景例句
How long will it take for my mail to reach its destination?
我的信件到达目的地要多久？
Coming events cast their shadows before them.
山雨欲来风满楼。
As soon as he opened his mouth, everyone burst out laughing.
但他刚一开口说话，人们便哄堂大笑起来。