水的纯度定期检测。The purity of the water is tested regularly.要求学生们检验铜的纯度.The students are asked to prove the purity of copper.我们可以保证它的纯度.We can guarantee it pure....
The EPA's rules about what constitutes hazardous waste are backfiring against the nationwide recycling effort.环保署关于有害物质的法规同全国资源回收的工作正好唱反调.Its principal purpose is the cleanup of leaking hazardous waste disposal site...
The kitchen smelled warm and inviting and blessedly familiar.这间厨房的味道温暖诱人,使人感到亲切温馨.And who could sprout up so blessedly if I had died.假如我死去,谁还能安然地发芽茁壮.It's so blessedly quiet here.这儿多麽静啊....
Organic food is unadulterated food produced without artificial chemicals or pesticides.有机食品是未使用人工化学制剂和杀虫剂的纯净食品。Many pesticides are irritants.很多杀虫剂都具有刺激性。vegetables grown without the use of pesticides未用杀虫剂种植的蔬菜...