not a dry eye in the house字面意思房间里面没有人眼睛是干的，引申为全场无人不流泪；全场无不为之动容。

【例句】
There wasn't a dry eye in the house when they announced their engagement.
当他们宣布订婚的消息的时候，现场无人不为之动容。

His final monologue was simply heartbreaking. There wasn't a dry eye in the house.
他最后的独白，听了让人心碎，在场的人都感动落泪了。