Unfortunately, our relationship has deteriorated quite a bit over time.

不幸的是，我们的关系随着时间的推移恶化得很厉害。

It is saddening to see that relations between the two countries should have deteriorated to the present state.

两国关系恶化到今天这个地步，是令人痛心的。

The discussion quickly deteriorated into an angry argument.

这场讨论迅速演变成愤怒的争吵。

Her health deteriorated rapidly, and she died shortly afterwards.

她的健康状况急剧恶化，不久便去世了。

In the years since he stopped running, his joint had deteriorated badly.

在他停止长跑的那几年里，他的关节病变很厉害。

His condition got worse and worse.; His condition steadily deteriorated.

他的病情恶化，日甚一日。