如果观照过于变化多端或太微细的所缘，需要花很长时间才能培养出定力，而当你观照明显和有限的所缘，能较快地生起定力。
It will take time to develop concentration if you note an object too varied, or too subtle, while it can be aroused faster if you observe an obvious and limited object.
采用冷光源，不会因为长时间的使用而提高室内温度，而其他传统照明灯就恰恰相反了。
The cold light source would not improve the indoor temperature in a long period of use , on the contrary , other traditional lighting can not reach such effect.
在平均工资水平下，一个人一小时的工作可以赚取多长时间的人工照明？
Ask how much artificial light you can earn with an hour of work at the average wage.
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