单词：sievings
音标：[sɪv] ；
n. 筛分；筛选
单词：sievings 相关文章
It may not be the most melodious bit of birdsong youll ever encounter. [Titmouse alarm call]. But this particular call, issued by a tufted titmouse, conveys important information about the presence of potential predators. But only if other birds can
发表于:2019-01-20 / 阅读(30) / 评论(0)
2016年Scientific American(八)月
2016年Scientific American(八)月