单词:supplementary ratio
[经] 补充比率
单词:supplementary ratio 相关文章
We tend to think of cavemen as pretty serious carnivores, hunting game and then roasting the yummy bits over a roaring campfire. But scientists just reported discovering traces of starch on some ancient stone tools. Which suggests that there were pro
发表于:2019-01-08 / 阅读(59) / 评论(0)
Scientific American(十)月