知识贝壳
知识贝壳
所属栏目：英汉双解化学
A naturally-occur-ring white organic compound with a char-acteristic penetrating odor. It is a cycliccompound and a ketone,formerly obtainedfrom the wood of the camphor tree but nowmade synthetically. Camphor is used as aplaticizer for celluloid and as an ......（本文共 339 字 ） [阅读本文] >>