The moment you relax or take your attention away from keeping it submerged, the ball will bounce back up and splash water in your face.
一旦你放松或一不留神那么球就会向上弹起将水溅在你的脸上。
When little downy chicks first try to dive they bounce back up out of the water like ping pong balls, of course it only takes a few days for these little chicks to become master divers.
当毛茸茸的小宝宝首次尝试潜水时，牠们像乒乓球一样地从水中弹出，当然，这些小家伙只需要几天的功夫就能成为大师级的潜水员。
By sending out sounds which bounce back like echoes, a dolphin can tell if a rock or a fish lies ahead of it in the water!
通过像回声一样反弹发出的声音，海豚可以在水里分辨是岩石或者是一条鱼在它前面！
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