This thesis emphasized on the preparation of mesoporous molecular sieves MSU.中孔分子筛MSU是当今认为在稳定性方面很有发展前途的一种催化新材料.The mesoporous silica molecular sieves Zr - MCM - 41 were synthesized in ethylenediamine.以乙二胺为碱性介质合成了Zr-MCM-4...
如果我是他,我宁可战斗到最后一息.If I were he I should wish to fight to the death.在停了一息后她又重新加入我们唱着.She joins us to sing again after having be stopped one interest.他战斗到生命的最后一息.He fought till his last breath....
旅行的终点是马拉喀什古城。The journey ends in the ancient city of Marrakesh.我们多年来都开着一辆生锈的旧货车四处旅行。We spent years travelling around in a rusty old van.她经常旅行，穿梭于她在世界各地的多处住所。She travels con-stantly, moving among her several residences ar...