Deal with the causes of obscuration, not with the sun.

（比如眼翳）需要治理的是障碍的成因，而非太阳。

Fire hazard testing - part 6-2: smoke obscuration; summary and relevance of test methods.

火灾试验。第6 - 2部分：烟雾不透明度。试验方法的概要及其相关方面。

In order to reduce the obscuration, conical baffle of secondary mirror is ameliorated into a shutter one.

为了减小初始中心遮光比，将次镜锥状遮光罩改进为百叶窗式结构；

Smoke obscuration test is applied to measure and assess the potential hazard due to the obscuration of smoke.

烟模糊试验适用于测量和评估这种危险性。