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.Their magneto mechanical coupling behavior is systematic...
He could no longer hold back convulsive laughter.他再也忍不住，前俯后仰地大笑起来。She kept trying to hold back her tears.她一直在试图抑制住眼泪。She closed her eyes tightly in a vain attempt to hold back the tears.她紧闭双眼，却无法忍住眼泪。...