twenty-twenty

I am a twenty - twenty student But many of classmates are near - sighted.

我班的許多同學都得了近視,可我的視力卻很正常.

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You have a twenty - twenty vision.

你的視力很正常.

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I have twenty - twenty vision.

我的視力正常.

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I think RMA is at least thirty years from now . May be twenty, twenty - five , twenty - three.

至少還需要30年,也可能20 、 25或23年.

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