Every child, besides some tough temper, some rough edges just not be smoothed by secularity, there is another thing, namely, the kind of clear-cut love and hate which had no reason and so happened.

但凡少年，除却顽劣的脾性，没被世俗磨平的棱角，还有一点，即那分明的爱憎。不明所以又理所当然的爱憎。

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For example, if a knife becomes blunt and can no longer cut off the ends of the tubes correctly, the seal will be left with rough edges.

例如，如果某刀片变钝，不能正确地切除管筒的末端，密封的边线就会很粗糙。

youdao

For example, if a knife becomes blunt and can no longer cut off the ends of the tubes correctly, the seal will be left with rough edges.

例如，如果某刀片变钝，不能正确地切除管筒的末端，密封的边线就会很粗糙。

youdao