Learn Chinese Smarter
yù dào guāng huà shè xiàn
遇到光化射线
meet actinic ray
jìn xíng guāng huà zuò yòng
进行光化作用
have photochemical action
chǎn shēng guāng huà yān wù
产生光化烟雾
cause photochemical smog
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