随着冬季的到来，白天的时间逐渐减少。

As winter approaches, the daylight hours start to ___decrease.

潮湿的环境会让木头更快地腐朽。

Damp conditions make wood ___decay more quickly.

在使用数组之前，你需要先声明它。

You need to ___declare the array before using it.