单词：tannin weighting
单宁增量
单词：tannin weighting 相关文章
Lesson 77 There's Nothing Like Leather! 第77课 百货不如皮货 Every child who reads this book knows that leather is made from the skins of animals. We cannot, of course, call any piece of skin leather; it must be carefully prepared before we ca
发表于:2019-01-17 / 阅读(142) / 评论(0)
英国学生科学读本
英国学生科学读本