求翻译：于是就问他：“为什么要哭？”伯俞回答说：“从小到大，母亲打我，我都觉得很痛。我能感受到母亲是为了教育我才这么做。但是今天母亲打我，我已经感觉不到痛了。这说明母亲的身体愈来愈虚弱，我奉养母亲的时间愈来愈短了。想到此我不禁悲从中来。”是什么意思？

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Therefore asks him: “Why has to cry?”Primary Yu replied: “From infancy to maturity, the mother hits me, I all thinks very the pain.I can feel the mother am in order to educate me only then such to do.But today mother hit me, I already cannot feel the pain.This indicated mother's body is increasingly

So he asked him: "why should I cry? "Uncle Yu replied," from small to large, my mother hit me, I felt the pain. I can feel my mother is to educate, I did not do so. But today my mother hit me, I have felt no pain. This shows that mothers body increasingly weak, I took care of mothers increasingly sh