phot-,光，chemical,化学的。

1. The photochemical reactions transform the light into electrical impulses.

光化学反应使光变为电脉冲。

来自《权威词典》

2. The role of photochemical reactions in soil pesticide degradation remains uncertain.

光化学反应在土壤中的农药的降解方面的作用还没有确定.

来自辞典例句

3. The photochemical effect has been reproduced many times in laboratory experiments.

光化学效应在实验室试验中多次复制.

来自辞典例句

4. Ozone is formed in the stratosphere and mesosphere by photochemical processes.

由于光化过程,在平流层与中层内产生了臭氧.

来自辞典例句

5. Thus it is electric field which triggers the photochemical process.

因此是电场引发光化学过程.

来自辞典例句