应该是back up what i said
i take back my words.简单啊~
回收 [词典] recovery; recover; reclaim; retrieve; recuperation; callback; [例句]对废弃物的回收利用能够减少对垃圾场的需求，从而也有助于控制环境污染。Recycling also helps control environmental pollution by reducing the need for wastedumps
Recover what I has just said
回收(东西以便再利用）：recycleAllglassbottleswhichcan'tberefilledcanberecycled.所有不能再次装用的玻璃瓶子都可以被回收利用。回收/收回（说过的话）：takebackEvenfourhorsescannottakebackwhatonehassaid.一言既出,驷马难追.ItakebackwhatIjustsaid.我收回我刚才说的话.
I take back what I've just said.I take back my words.
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浩予妈妈
