Parnanthracene
[化] 双蒽; 仲蒽; 聚二蒽
🗣️ 情景例句
He's going to be in New York tomorrow
明天， 他要来纽约
That's fine.
那很好。
A temporary rudder was made on board from spare planks and it was fitted with great difficulty.
船员用备用的木板在船上赶制了一只应急用的舵，并克服重重困难将舵安装就位，