洞是无形的，就如人不会是十全十美，我们或许永远填不满这洞，就好像人不会十全十美，也就正如学习，学习是无止境的。
The hole is intangible, as people are not perfect, we may never fill the hole, as if people do not perfect, also like learning, learning is endless.
洞是无形的，就如人不会是十全十美，我们或许永远填不满这洞，就好像人不会十全十美，也就正如学习，学习是无止境的。
The hole is intangible, as people are not perfect, we may never fill the hole, as if people do not perfect, also like learning, learning is endless.
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