health 是 名词 “健康” 的意思
healthy 是形容词 “健康的” 的意思选Akeep和stay 这里都需要跟形容词 keep fit=stay healthy保持健康当然不是呆的意思, 这里stay也是保持的意思keep fit, keep healthy, stay fit, stay healthy 都是保持健康的意思 It's important for us to keep fit. It means we need to stay healthy.保持健康对我们来说很重要。 这意味着我们需要保持健康。
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