There are some problems such as extensive running, leave unused and so on in land using.

土地资源利用中存在着粗放式经营、闲置浪费等问题。

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Based on the model of principal-agent of information economics, this paper studied the phenomenon of leave unused capital of chinas listed enterprises.

文章基于信息经济学理论构建委托代理模型，研究我国上市公司资金闲置问题，并引入声誉因素对模型进行动态博弈分析。

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Instead of picking up and using the pen, you could leave it on a shelf or in a drawer where it will dry up, unused.

相反，你甚至可以根本不去动用这支笔，把它扔在书架上或是抽屉里让它的墨水干枯。

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In Boston, by contrast, only 37% of workers leave unused vacation time on the table.

FORBES: Washington D.C. Residents Most Likely To Go On Vacation, Chicagoans Least Likely

It rests with men whether they will make the proper use of the rich treasure with which this knowledge provides them or whether they will leave it unused.

FORBES: The Greatest Thinker You've Never Read: Ludwig von Mises

In cases where workers fall sick towards the end of the year, and are unable to take all of their annual leave, they can under EU law carry over their unused leave into the next accounting period.

BBC: EU court: Workers sick on leave can get extra time off