大气粒子对激光束的散射是造成光束衰减的原因之一。
One of the reasons of attenuation is absorbing of particles.
本文从膜片弹簧受力变形后内部应力分布着手，分析了膜片弹簧早期弹力衰减的原因。
The causes for the elastic force attenuation of diaphragm spring are analyzed based on the stress distribution of loaded diaphragm spring.
作为海上用绳索，导致性能衰减的原因包括拉伸、磨损、日晒、雨淋以及海水腐蚀等。
For Marine ropes, there are variant factors which produce degradation. They include tensile, wear and tear, sunlight, raining and corrosion in sea.
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