酸雨

běi jīng shì huán jìng bǎo hù kē xué yán jiū suǒ zhì dìng le suān yǔ jìn qī yán jiū jì huà

北京市环境保护科学研究所制定了酸雨近期研究计划。

The Beijing Academy of Environmental Sciences has formulated a research plan on acid rain in recent past.

suān yǔ kòng zhì qū yù

酸雨控制区域

acid rain control district

suān yǔ duì zì rán huán jìng de yǐng xiǎng

酸雨对自然环境的影响

the effects of acid rain on the natural environment