功夫不负有心人什么意思?

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• 请纠正我的英语日记语法错误It's raining again.To be frank,I'm fed up with this tiny city.Always rain,always wet,always need to armed yourself with an umbrella.Well,I decide to give myself a totally free morning to do something pointless.Lost time is never found again,am I being extravagant?I had a little baby sister in my dream last night.Mama doted on her and I became the superfluous person.I cried with all of my heart.I begged of mama don't leave me alone.But she
• 一个箱子里装满实心球一箱子里装满了实心球,连箱子共重12千克.从箱中取出实心球的1/4后,剩下的实心球连箱共重9.5千克.问箱子多少千克?（具体算式)