Despite being classified as a depressant, alcohol initially acts as a stimulant on the central nervous system.虽说被划定为镇静剂，酒精最初却是被当作中枢神经系统的兴奋剂。Rocks can be classified according to their mode of origin...可以根据岩石的成因对其进行分类。The ...
She never participated in obtaining or copying any classified documents for anyone.她从未参与过为任何人获取或复制机密文件之事。He has a security clearance that allows him access to classified information.他获得了安全许可，可以接触机密信息。The books in the lib...