The developments of manufacturing technology and research on ethylidene norbornene abroad were reviewed with 71 references.介绍了国外亚乙基降冰片烯的生产技术和科研工作的进展情况....
这种文献倡导普遍的禁欲主义和粗陋的平均主义.It inculcated universal asceticism and social levelling in its crudest form.晚饭毕, 粗陋的碗盏收拾干净.The meal ended, and the humble preparations were removed.年轻的绝代美人伊俄涅坐在粗陋的火炉旁.The young, the all - beautiful ...