deteriorates

v.恶化；变质；衰退

We cannot allow the situation to deteriorate. 我们不容许情况恶化。

Relation between the two countries have deteriorated sharply in recent week. 最近几周那两个国家间的关系严重恶化了。

Food is apt to deteriorate in summer. 食物在夏天容易变质。

The discussion deteriorated into a bitter quarrel. 这场讨论演变成了激烈的争吵。

His sight have begin to deteriorate. 他的视力已经开始下降。