I'm afraid I was rather bad-tempered yesterday; I think I owe you an apology.恐怕我昨天的脾气不怎么好, 我认为应该向你道歉。Rest assured, if you owe taxes, we will collect them.不用多想，如果你欠税，我们会去收的。As a professional composer I owe much to Ra...
微生物合成丙三醇在生产原料 、 生产机制、提取方面各具特点.Microbial production of glycerol have various characters in production raw, mechanism recovery.醇酸树脂: 热固性树脂.是丙三醇(甘油)和笨二酸(酞酸)起化学反应的产品.Alkyd resin: Thermosetting resin, obtained as reaction pro...