1.keep up 保持

Donahoe recently claimed that retailers flock to ebay seeking a technology partner to keep up. "
多纳霍最近声称，零售商纷纷涌向eBay，寻求技术合作以保持竞争力。

Many japanese strive to keep up egalitarian appearances.
很多日本人努力保持平等待人的形象。

2.confess to 承认，坦白

I confess to not being particularly consistent at timekeeping.
我承认自己并不是一贯特别守时。

The police hoped he would confess to a crime he didn't commit.
警方希望他能够坦白他所犯下的罪行，但是他什么都没做。

3.go back 回转；回顾

And I will go back to not talking after tonight.
今晚采访之后，我又得回去埋头干活了。

I can't go back and end this now.
我现在不能回去并结束这一切了。