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1·His painting became less illustrational and more fluid.

他的画变得更为流畅，没那么生硬了。《柯林斯英汉双解大词典》

2·The illustrational results show that we can realize a fast and accurate evaluation for college library service quality by this method.

实例表明，该方法能够实现对高校图书馆服务质量的快速、准确的评价。

3·This paper gives an an illustrational proof to beam intensity distribution for narrow beam of rectangular cross section, and presents an accurate expression to calculating beam intensity.

本文对截面为矩形的窄束给出束强分布的图解法证明，并提出计算束强的精确公式。