The developments and present situation of magneto - optical materials rare earth ( RE ) iron garnets, were reviewed. 本文以稀土铁石榴石为主,综述了 磁光材料 的发展和研究现状 、 着重介绍了在光通信器件中的应用.
挪威的捕鲸人说昨天他们用捕鲸叉捕获了一头雌性小须鲸。Norwegian whalers said yesterday they had harpooned a female minke whale.委员会要求全球禁止捕鲸。The commission is calling for a global ban on whaling.岛上的居民靠捕鲸为生。Communities on the island depended on whalin...