同根派生 fifth columnism相关词英汉例句用作名詞 (n.)Beware of the fifth column. They often infiltrate into key positions and seek to undermine the body politic from within.要提防隱蔽的敵人，他們經常滲透到關鍵崗位企圖從內部破壞國家政躰。fifth columnism更多例句