重新爆发

to back up───备份

to buck up───振作起来

to jack up───顶起

to pack up───收拾行李

to rack up───准备

back up───v.支持，援助；（资料）备份；倒退；裱；堵车

go back on───违背；背弃

After performing actions in a pop-up window, focus back to the main window.───在弹出窗口中执行操作之后，焦点返回到主窗口。

When the display goes black, press Enter and the display will pop back up.───当显示屏变黑时，按回车键，显示屏就会弹回。

At sunset, the Sun would drop below the horizon, then pop back up into view before resuming its normal course, ultimately setting again for a second time within a week.───日落时太阳将先落下地平线然后在一般情况出现前重新露出再在一周的时间里继续落下第二次。