v.惡化；變質(zhì)；衰退
Relation between the two corntuies have deteriorated sharply in recent week. 最近幾周那兩個(gè)國(guó)家間的關(guān)系嚴(yán)重惡化了。
Food is apt to deteriorate in summer. 食物在夏天容易變質(zhì)。
The discussion deteriorated into a bitter quarrel. 這場(chǎng)討論演變成了激烈的爭(zhēng)吵。
