Making hydrogen by electrolyzing water is energy intensive and can be expensive.通过电解水制造氢气,能源消耗大而且价格昂贵.The synthetic methods of ferrocene were divided into two categories: chemical synthesis and electrolyzing synthesis.二茂...
选择防晒护唇膏来增强保护。For added protection choose a lipstick with a sun screen.这部电影未在北爱尔兰政治问题上选择站边。The film takes no position on the politics of Northern Ireland.关节炎的新疗法可能是止痛药之外的另一种选择。New ways to treat arthritis may provide an al...