life is full of ups and downs是什么意思

life is full of ups and downs生活中总是有起有落的。To me , life is full of ups and downs for everyone. If people can be kind and helpthose in trouble, our world will be more beautiful. 我认为，每个人的一生都充满着得失成败。若人们都可以怀有善心地向受困的人伸出援助之手的话，这世界定然会变得更加美丽。
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