Many things rot away over a long time.

经过很长一段时间，许多东西都烂掉了。

Some of rubbish , such as food, paper and iron, rot away over a long time.

有些垃圾，如食物，纸张和铁器，时间长了就烂掉了。

Some of rubbish , such as food , paper and iron, rot away over a long time.

有些垃圾，如食物，纸张和铁器，时间长了就烂掉了。