请问 keep bouncing

请问 keep bouncing 请问Keep eye contact you're bouncing checks啥意思? mails to this ID are bouncing.这里的bouncing该怎么理解,英语句子翻译：mails to this ID are bouncing.这里的bouncing该怎么理解, 请问please keep me posted 请问Keep moving forword是什么意思? 请问keep an eyes on 请问KEEP IT AS RECORD 请问：keep step with和keep pace with的区别? bouncing clay 我在一盒玩具泥上看到的 keep on trying 与 keep trying 的区别请问 keep on trying 与 keep trying 的具体区别, 请问：How to keep you suffer 请问Keep you posted afterwards”是什么意思 请问一下keep the desire to 请问Who needs to keep me warm keep away from;keep out;keep off;keep up的意思?We can often see the notice_______ the grass in the park.A.Keep away fromB.Keep outC.Keep offD.Keep up请问他们的意思分别是? keep keep