研究了经双凸透镜两个光具面 L_1和 L_2的透射光线和反射光线的近轴成像规律，以此说明其像群的形成。

The rule of adaxial image formation is studied, of the transmission light and reflected light through the two optical surfaces L_1 and L_2 of the biconvex lens.

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一缕微弱的光线从树枝间透射过来。

A watery light began to show through the branches.

《柯林斯英汉双解大词典》

阳光的光线一直能透射到水下10英尺处。

The sun's rays can penetrate water up to 10 feet.

《柯林斯英汉双解大词典》