A lot of research need do because it is difficult to resolve the problem of uneven dispensability of nano-particles in polymer.

但如何解决纳米粒子在高分子基体中难以均匀分散的问题，仍需要做大量的研究工作。

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There's been a lot of handwringing lately over grade inflation, and it is a scandal, but the most scandalous thing about it is how uneven it's been.

最近有很多文章谈到分数膨胀的问题，这是丑闻，但是最丑陋的地方在于它是多么地不平衡。

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