We cut a lot of hay and, as it rots, it does improve the soil's composition.

我们割下许多干草，当它们腐烂时，的确可以使土壤更加肥沃。

" I've been thinking what rot it is to go doing things by halves" !

“我一直在想， 事事半途而废有什么不好” ！

" If half of an onion is black with rot, it is a rotten onion. A man is good, or he is evil" .

" 如果洋葱有一半腐烂发黑，那便是颗坏洋葱。一个男人要不当好人，那就是恶人。"

So that is the meaning of to rot; it's when something that was once living dies and begins to smell and look ugly.

这就是腐烂的意思；这是曾经有生命的东西死去并开始闻起来并且看起来很丑陋的时候。