Dnn
[医][=1，5-dinitronaphthalene]1，5-二硝基萘
🗣️ 情景例句
His appearance is impressive.
他的外表给人印象深刻。
The post office is two blocks straight ahead, You can't miss it.
那邮局一直向前走过两条街，很好找。
and that their rims are clean and dry.
瓶口清洁干燥。