单词：perchlorates
n. 【化】过氯酸盐
[网络] 高氯酸盐；过氯酸盐类
[网络] 高氯酸盐；过氯酸盐类
单词：perchlorates 相关文章
As July 4th approaches, Americans look to the skies. Throughout the country, fireworks will be launched in celebration of the nation's independence. But what goes up must come down. Reporter Eric Libby looks at the environmental issues surrounding f
发表于:2019-02-04 / 阅读(41) / 评论(0)
VOA标准英语2008年（七月）
VOA标准英语2008年（七月）