买几双能放进包里的折叠平底鞋(最好是宝石的)，这样你就没有理由天天穿着一双高跟鞋了。
Buy some fold-up flatties (jewelled, preferably) that can slip into a bag so that you have no excuse not to wear a pair of heels now and again.
构造的曲面是分片双三次有理参数多项式曲面。
This surface is a piecewise bi-cubic rational parametric polynomial surface.
她有理由问这样的问题，出于羞愧和骄傲，她把一双手套扔到可他的脸上，抓着他不放。
She had some reason to put the question, for shame pride threw double gloom over his countenance, kept him immovable.
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