She wondered if Harry had been unfaithful to her during this long separation...她不知道和哈里分开这么久,他是否曾对她不忠。The best choice for separating diethylbenzene is the adsorptive separation by zeolite adsorbents in high efficiency.指出高...
DuPont has offered the technology to fluoropolymer manufacturers globally in a royalty - free exchange.并且,杜邦已将这一技术免费提供给全球范围内的氟聚合物制造商.The preparation methods and materials such as ( fluoro - monomer ) and fluorosurfactant...