Parnanthracene
[化] 双蒽; 仲蒽; 聚二蒽
🗣️ 情景例句
You haven't changed much in fifty years.
你五十年来没有什么变。
Buy one get one free.
买一送一。
Fish love swimming round the rocks and through holes in them.
鱼喜欢绕着岩石和穿石洞游水。