previously基本解释
adv,以前；预先；仓促地
previously相关例句和用法Guyana's railways were previously owned by private companies..圭亚那的铁路先前为私营公司所拥有。
previously英英释义事先advadv
previously 真题例题真题例句...the scientist confirmed the snake was a previously unknown species after conducting a genetic analysis of tissue samples
