1. de facto 实质的
She was Mr. Kim's de facto first lady and a fierce campaigner for her sons.
她才是金正日事实上的第一夫人，对孩子而言，她也是一个积极的活动家+-jfI7F06+!]8E)Vx-。

2. fail to do sth. 未能
Previous (government has) governments have failed to overhaul the system, he said, his would not.
他说，之前的政府未能彻底检修系统，但是他不会这样做了4!Vv63+**vbscoc。

3. strike a balance between 努力平衡……和……
Managers have to strike a balance between expenditure and efficiency and between the cost of anticipation and that of repair.
管理人员必须努力平衡支出和效率，预防成本和维修成本O1uy5!xPZ08。

4. prop up 支持，支撑起
Women is not just prop up half the sky.
女人撑起的不止是半边天sj[|wL@P,+P]Q;1。