Alkanes can be chlorinated or brominated by treatment with chlorine or bromine in the presence of visible or uv light . 烷在可见光或紫外光照射下，用氯或溴处理才能氯化或溴化。
Alkanes can be chlorinated or brominated by treatment with chlorine or bromine in the presence of visible or uv light . 烷在可见光或紫外光的照射下，用氯或溴处理能氯化或溴化。
The researchers found that the plant leaf converts 8.5 per cent of the light falling on it into chemical energy . 研究者发现，这种植物能把照射在叶子上的阳光的8.5转变成化学能。
He found that irradiation of micrococcus and of murine lymphoma cells under anoxia gave fewer singlestrand breaks . 他发现，在缺氧时照射小球菌和小鼠琳巴瘤细胞产生的单链断裂较少。
The researchers used fast neutrons to irradiate mouse embryos between the blastocyst stage and the beginning of somite formation . 研究人员用快中子照射在胚泡期和体节形成开始之间的小鼠胚胎。
Wood is charred by exposure to thermal radiation, the depth of the char being closely proportional to the radiant exposure . 木料受到热辐射照射后就会烧焦，烧焦的深度大致上与辐射照射成正比。
Acceptable neutrals and good color rendition are obtained upon exposure of the film to any one of a variety of illuminants . 胶片在任何一种光源照射下曝光时都能得到满意的中性灰和良好的彩色还原。
