单词:INSACS
abbr. Interstate Airway Communication Station <美>州际航路通讯站
单词:INSACS 相关文章
How Birds Breathe 鸟是如何呼吸的 Y: Don, flying is tougher than walking or running, right? So how come birds dont get winded and run out of breath? D: Actually, in terms of distance per unit energy, flying is pretty efficient . Plus birds have
发表于:2019-02-16 / 阅读(51) / 评论(0)
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