translation.en: He suggested that dimensions might come in two varieties -- there might be big, easy-to-see dimensions, but there might also be tiny, curled-up dimensions, curled up so small, even though they're all around us, that we don't see them.
translation.zh: 他认为维度可能以两种形式存在-- 一种维度可能很大，很容易被认知， 另一种可能很小，卷曲在一起的维度， 因为卷曲得太小了，虽然存在于我们周围， 但我们无法认知。