1.at least 至少
例句:He's been away for at least a week.
他走了总有一个星期吧。
2.speed up 加速
例句:He pushed a lever that speeded up the car.
他挂挡加快了速度。
3.work out 解决;算出
例句:Things just didn't work out as planned.
事情根本没有按计划进行。
4.push back 向后推;使撤退
例句:Whatever is pushing on you, you've got to push back.
不管什么攻击你,你都要反击。