【英语问题】They can help keep the balance of nature.这句子中为什么要加定冠词“the”
问题描述：
【英语问题】They can help keep the balance of nature.这句子中为什么要加定冠词“the”
答
【英语问题】They can help keep the balance of nature.这句子中为什么要加定冠词“the”