悬而未决：指某事尚未解决或未得到明确的答复。
悬而不决
搁置
After a bird has flown from one tree to another, what trace does it leave in the air?
当一只鸟从一棵树飞到另外一棵树时，牠在空中留下什么痕迹呢？
Instead of asking for volunteers at the gate to leave overbooked flights, Delta Air Lines now is enabling travelers to bid on the opportunity much earlier in the process.
与其在登机口说服游客自愿离开已经超售的航班，达美航空现在可以让旅行者提前为补偿的现金券竞价，并接受航班变更。
Sometimes I imagine taking a page design that's too crowded and sticking it on a balloon, then blowing air in until everything on the page pulls apart to leave healthy gaps.
有时候我甚至想把一些非常拥挤的网页粘到气球上，然后一直吹气直到页面上所有东西之前都有足够的空隙。
Whether her partner deserves better or worse is just one of the troubling question marks this superior mystery thriller dares to leave hanging in the air.
But it does leave the question hanging in the air: is that it?
Some revisionist history can leave the reader up in the air, wondering why, in the light of the historian's myth-busting, Catholic and Protestant bothered to quarrel with each other at all.