摘要：incompetence noun [ U ] US/ɪnˈkɑːm.pə.t̬əns/ lack of ability to do something successfully or as it should be done: Management have demonstrated almost 阅读全文

摘要：易错点注意： 若条件是“varname>某值”，则必须加一个非空条件：& !missing(varname) 变量名长度限制在10 characters内 重命名之后，要在label最后记录原变量名（原变量名） Variable name When planning names, anticipat 阅读全文