Anhydride - type curing agents require the application of heat to promote polymerization.酸酐类固化剂则要求加热以促进聚合反应.Exothermic reaction can be reduced by adding hexahydrophthalic anhydride to the phthalic anhydride.用六氢化邻苯二酸酐加入到邻...
The visitor can ponder over the boomerangs used by aborigines at the time of Cook.来访者可以琢磨琢磨土著人在库克时期用的回飞镖.They would do well to pause and ponder upon their new responsibilities.人们最好还是停一停,好好地想一想自己所负的新责任.You should pause an...
"Aromatherapy oils" are not pure essential oils but dilutions.“香薰精油”并非纯精油，而是经过稀释的。Wendy Rigby was recently invited to lecture a group of doctors on the benefits of aromatherapy.温迪·里格比最近应邀给一帮医生讲芳香疗法的疗效。'Aromatherapy ...