precise definition造句

1、Can you give a more precise definition of the word?
你能给这个词下个更确切的定义吗？

2、A precise definition of poverty is actually very difficult to determine
对贫困的精确定义实际上是很难的。

3、A precise definition of poverty is actually very difficult to determine.
对贫困的精确定义实际上是很难的。