n. 丹宁酸;鞣酸类
n any of various complex phenolic substances of plant origin; used in tanning and in medicine

ENVIRONMENT REPORT – May 24, 2002: Less Gas from Farm Animals By George Grow This is the VOA Special English Environment Report. Scientists in New Zealand have found a way to reduce methane gases re

发表于:2019-01-07 / 阅读(98) / 评论(0) 分类 健康与环境