It was so hot that his face reddened.

天气太热了，他的脸都红了。

The soldiers' blood reddened their clothes.

战士们的血染红了他们的衣服。

His eyes reddened at the news.

听到这个消息，他哭红了眼。

Blackberries beginning to redden.

黑莓开始变红了。

I saw him redden with pleasure.

同您谈话很愉快。

Then Arethusa will redden a new river.

到时阿瑞梭莎在新河也会脸红。

Humans redden when they are angry.

人类愤怒时会脸红。

They redden the hills now.

它们染红了群山。