Dinaphthylamine
二萘胺
🗣️ 情景例句
Nowadays many people go traveling for the holidays.
下面许多人都在假期里去度假。
What time's the next train to Washington?
下一趟去华盛顿的车几点开？
For the first time in his life, he became the proud owner of a bed which had springs and a mattress.
他平生第一次自豪地拥有了一张既有弹簧又带床垫的床。