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

【英语问题】They can help keep the balance of nature.这句子中为什么要加定冠词“ 英语作文“keep the Balance of Nature” 英语作文大全题目是how to keep the balance of nature如题 We think it important to keep the balance of nature upset the balance of nature All of us found _____necessary to keep the balance of nature It is important that we should keep the balance of nature改为简 （ ）have been trying every way to keep the balance of nature. （）have been trying every way to keep the balance of nature 辨别两个英语句子1.We think it is important to keep the balance of na we should k_ the balance of nature nature前面不能加定冠词the