every rose has its thorn

Nobody is perfect and every person is riddled with flaws. Even a flower as beautiful as the rose has certain flaws but that does not take away its beauty.

意思是没有人是完美的，每个人都有缺点。即使像玫瑰一样美丽的花也有一些缺陷，但这并不能抹杀它的美丽。

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The Internet has brought a lot of benefits, but it has also caused problems such as computer hackers or virus. Every rose has its thorn.

互联网带来了很多好处，但也带来了问题，如电脑黑客或病毒。没有十全十美的事物。