常見例句雙語例句Tasking collection amongst witting or unwitting social groups could be an expedient way of finding out what's going on in some field of concern.在有意或無意的社會團(tuán)躰中收集情報可能是探究某些領(lǐng)域之究竟的便利方法。blog.sina.com.cn 返回 field expedient