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.He was still unexcited.他仍然不激动....
The credit card business is down, and more borrowers are defaulting on loans.信用卡业务出现了下滑，而且越来越多的借款者都不按期还款。Mexico needed $ 1 billion to avoid defaulting on loans to New York banks.墨西哥需要十亿美元以免拖欠一些纽约银行的贷款.The notification st...