单词：zinnia elegans
百日草
单词：zinnia elegans 相关文章
Worms seem like strange animals to send to the International Space Station. It's not like astronauts are going to take time off to go fishing and need to bait their hooks. So why send worms? Believe it or not, scientists are using a microscopic worm,
发表于:2018-12-07 / 阅读(91) / 评论(0)
大千世界
大千世界
SCIENCE IN THE NEWS - October 22, 2002: Nobel Science Prizes By George Grow VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with SCIENCE IN THE NEWS, a VOA Special English program a
发表于:2019-01-04 / 阅读(58) / 评论(0)
科技之光
科技之光