converse v. ~ (about sth); ~ (together) (fml ) talk
convert v. ~ (sth) (from sth) (into/to sth) change (sth) from one form or use to another
好学英文网
本周一,中国第七支北极科考队在结束为数78天的科研考查任务后,乘坐中国雪龙号破冰…