This document explains the rules of copyright.
这份文件
了版权
规定。
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西藏王朝 I explain it on two grounds, I replied. In the first place, because vertical currents, which are caused by differences in the water's salinity and density, can produce enough motion to sustain the rudimentary lifestyles of sea lilies and starfish.
我
两个理由来解释,我回答,第一,因为那些上下垂直往来
水流,由海水
不同咸度和不同密度决定,发生一种运动,足以维持海百合和海星一类
原始基本生活。
概念英语.英音版.第四册(译文)
业
务英语