one of the animals that helps people lot is the dog.这个句子怎么理解,that怎么在这用,详解.

one of the animals that helps people lot is the dog.这个句子怎么理解,that怎么在这用,详解.

这里that是引导定语从句,先行词animals在定语从句中做主语,从句中helps作宾语.翻译时,可以先把定语从句去掉,先理解主句,one of the animals is the dog,然后理解定语从句.帮助人类之一的动物是狗