There are several ways to separate excited from unexcited molecules, thus harvesting the desired isotope. 目前有几种方法可以把受激发分子同未受激发分子分离开, 这样,就可以大量得到我们所需要的同位素了.
The sash, kimono, and other garments were made to fit a child.腰带、和服和其他衣服都是儿童款的。She arrived to receive the sash of office from the outgoing president.她走上前去从即将离职的总统手中接过了就职腰带。She wore a white dress with a thin blue sash.她身着...
The service covers contraceptive advice and health checks, and is available free.服务项目包括避孕建议和健康检查，并且免费提供。It was at that time she started taking the contraceptive pill.她就是从那个时候开始服用避孕药的。There are two types of contraceptive ...