求翻译：Have you ever complained（抱怨）why life is so tiring？Does the sky sometimes seem dark to you？Are your studies sometimes not successful？Well，friends，cheer up and smile all the time.If you see the word with your warm heart，you’ll find that the whole world smiles to you.是什么意思？

Have you ever complained (complaint) why life is so tiring? Does the sky sometimes seem dark to you？ Are your studies sometimes not successful？ Well，friends，cheer up and smile all the time. If you see the word with your warm heart，you’ll find that the whole world smiles to you.