unproductive造句

I've had a very unproductive day.
我这一天什么事都没干成。

One quarter of the country is reckoned as unproductive.
该国四分之一的土地被认为是不毛之地.

To prospect for ( oil, for example ) in an area supposed to be unproductive.
盲目开掘在认为资源不足的地区盲目找 ( 如油 )

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