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....
In the final Capriati, the third seed, defeated Katerina Maleeva.在决赛中，三号种子选手卡普里亚蒂击败了凯特林娜·马莉娃。Katerina, played by Vera strives to earn her degree and also works hard at a factory.维拉·阿莲托娃饰演的凯特琳娜, 为获得学位而苦苦奋斗,并在一家工厂辛勤工作.Mr C...