单词：hybrid DNA
【分子生物学】杂种DNA
单词：hybrid DNA 相关文章
JUDY WOODRUFF: Next: the possibilities of getting more energy through water. Humans have long harnessed the power of water to perform work. In modern time, hydroelectricity, generated by the power of water flowing through turbines at the base of dams
发表于:2019-01-27 / 阅读(76) / 评论(0)
PBS访谈环境系列
PBS访谈环境系列
GWEN IFILL: As Iraq continues to fracture, there are new concerns about the security of its considerable oil production facilities. Only last month, the country's crude oil production reached 3.6 million barrels a day, the most since Saddam Hussein t
发表于:2019-01-27 / 阅读(26) / 评论(0)
PBS访谈社会系列
PBS访谈社会系列