hard because there's no conclusive definition of poverty 请帮忙分析下句子结构?这句话是在做阅读时看到的,上下文是.who's poor in America?That's question hard to answer.Hard because there's no conclusive definition of poverty.

hard because there's no conclusive definition of poverty 请帮忙分析下句子结构?这句话是在做阅读时看到的,上下文是.who's poor in America?That's question hard to answer.Hard because there's no conclusive definition of poverty.
hard because there's no conclusive definition of poverty 请帮忙分析下句子结构?
这句话是在做阅读时看到的,上下文是.who's poor in America?That's question hard to answer.Hard because there's no conclusive definition of poverty.

hard because there's no conclusive definition of poverty 请帮忙分析下句子结构?这句话是在做阅读时看到的,上下文是.who's poor in America?That's question hard to answer.Hard because there's no conclusive definition of poverty.
it is hard because there is not conclusive definition of poverty.
这句话省略了it is .
意思是加上前面：
在美国谁是穷人,这个问题很难回答,因为没有令人信服的对贫穷的定义.

Hard because there's no conclusive definition of poverty.
这个 Hard，是重复前面的那个 hard，起到强调，突出的作用。
可以看成是个省略句，It is Hard because there's no conclusive definition of poverty.
所以 because 就引导一个原因状语从句。
其余的就简单了吧。