The actual level of intensity depends on such factors as the physical layout, population density, and productive activities of a metropolis.
实际的强度水平取决于诸如大城市的物理布局、人口密度和生产活动之类的因素。
它肥沃多产。
For me it's helping young people to live a happy, healthy and productive life.
对我来说,它能帮助年轻人过上幸福、健康和富有成效的生活。
It was designed to permit prisoners to live free and productive lives that would help people in the city below.
VOA: special.2010.03.31
So the food environment can change and can change in productive ways and there are a lot of signs of this happening.
食品环境可以改变并可以很有创造性改变,有很多迹象都可以证明这一点
Instead, they do various things like govern and are priests, and are bureaucrats, and are engaged in other non-productive activities that depend upon others to feed them.
相反,他们从事其他职业,例如行政人员,神职人员,或是成为官僚,参与其他,非生产性活动,依赖他人供养
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