afternoon意为下午，属于不可数名词。
例句：Fog and low cloud cover are expected this afternoon.
预计今天下午有雾和低空云层。
相关介绍
I'll bike the contract over to you this afternoon.
今天下午我骑摩托车把合同给你送过去。
I have to go shopping this afternoon.
我今天下午得去商店买东西。
I'm having my hair cut this afternoon.
我今天下午要去理发。
If you come this afternoon the doctor will try to squeeze you in.
你要是今天下午来，大夫可以挤时间给你看看。
Will she be available this afternoon?
今天下午她有空吗？
His flight to Amsterdam connects with an afternoon flight to New York.
他飞往阿姆斯特丹的班机与下午飞往纽约的一趟航班相衔接。
