You must feel tired since you have to be active everyday.

你肯定感觉很累，因为你们每天都得活动。

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While active words demand constant practice and useful words must be committed to memory, words that do not often occur in everyday situations require just a nodding acquaintance.

积极词汇需要经常练习，有用的词汇必须牢记，而在日常情况下不常出现的次只需要见到时认识即可。

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"Nothing is perfect, but I feel like I can be a more active participant in everyday life with these hands, " said Koger, who now spends his time reaching out to new amputees about keeping a positive outlook on their situation.

CNN: Bionic hands controlled by iPhone app