糖会导致你的牙齿蛀蚀。

Sugar can cause your teeth to ___decay.

污染正慢慢地使这些历史悠久的石雕风化损坏。

Pollution is slowly causing the historic stonework to ___decay.

这座城市里许多较老的建筑物开始破败失修。

Many of the city's older buildings are beginning to ___decay.