各公司不断地尝试改进导线设计，但其中一个问题(即挑战)是，试验测试很难准确模拟人体上发生的事情。
The companies continually try to improve lead designs but one of the problems is, which is a challenge, for bench testing, it is hard to mimic exactly what happens in the human body.
作者依据多年设计实践，论述了在建筑照明设计中应注意的几个具体问题：如怎样合理地选择照度、导线、灯具等。
According to design experience for many years, author discusses several problems being paid attention in illumination design, as selecting lightness, lamps, lead and so on.
导线和电缆的选择是供配电系统设计中的主要内容之一。
The wire and electric cable's choice is one of for in electrical power distribution system design primary coverages.
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