Violanthrole
二苯并羟蒽
🗣️ 情景例句
I want to send this letter to China, by air mail.
我想把这封信航空邮到中国。
He who fears being conquered is sure of defeat.
怕吃败仗的就要打败仗。
Do you think the method of payment is OK for you?
你们认为结算方式合适吗？