Cholecalciferol is produced by irradiation of 7-dehydrocholesterol with ultraviolet light either from the sun or from an artificial source.

胆钙化醇是7?脱氢胆固醇经日光或人工来源照射而产生。

During the spring of one year he was walking tipsily along the street when he saw, in the sunlight at the base of a wall, Whiskers Wang(T26) stripped to the waist catching lice.

有一年春天，他醉醺醺在街上走，在墙根日光下，看见王胡在那里赤着膊捉子，他忽然觉得身上也痒起来了。

In the meantime, absorb many infrared ray, the eye ground that the direct illuminate place of orthoptic sun or intense arc light causes is injured, if common solar sex retina is choroid burnable.

同时，吸收大量红，直视太阳或强烈弧光直接照射所造底损伤，如常见日光性视网膜脉络膜灼伤。