这些材料无所谓有什么史料价值.These materials can't be said to have much value as historical records.艺术品和珍贵史料全被无情地毁掉了.Works of art and priceless historical records were ruthlessly destroyed.大量的史料不断聚积,他们难以判断从中选择哪些史实.They will hardl...
Bakelite is a well - known thermosetting material and it has a wide variety of uses.电木就是人们都熟悉的热固性材料,具有多种用途.The big black Bakelite phone rang at half past ten.十点半的时候,外壳用胶木做的电话响了.Bakelite lamp holder, what is bakelite , wh...