1.cycle out 退出
What trends from the past year will cycle out?
去年的哪些潮流将会淡出舞台呢？

2.sign off 签署
Contrary to expectations, Gates did not sign off on a finalized version of the concept before stepping down.
出人意料的是，盖茨在卸任之前并没有签署认可这一概念的最终版本WRquOn*8|0g!^iJgX9Ag。

3.allude to 提及
Try not to allude to this matter in his presence because it annoys him to hear of it .
他在的时候千万别提这件事，他听了要生气的~.-eLKH%fDG*#[B。

4.ahead of 在……之前
The Obama administration's health care reforms have been a central part of the US political debate ahead of midterm elections on Tuesday.
奥巴马政府的医疗改革是周二中期选举前开展的政治辩论上的一个核心议题YJ5(Z&U;v[V。