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你翻译的不错!稍加修改就完全正确——When I was a kid,I used to dream to fly in the blue sky.And now,I start the dream of flying,I 【am/feel一般现在时】free.还可以翻译为:When I was young,I used to dream of flying in the blue sky.And now,I begin to make my dream come true,flying freely in the air.祝你开心如意。