Based on the study of the microscopic flow mechanism of liquid in packed column, a zone-stooge model is proposed, by which the efficiency of the column is simulated in the non-ideal flow state.

本文探讨了填料塔中液体微观流动机理，提出了多区多级模型，对填料塔在非理想流动状况下的塔效率进行了模拟。

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Picnics and packed school lunches may never be the same again, thanks to the latest breakthrough by military science -- the non-soggy sandwich.

你能想象吗？从此以后，我们平时野餐带去的食物和学校的盒饭将会大变样噢！因为最近美国的军事科学又取得了一项成果，发明了“防水三明治”。

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Unlike the Transformers films, which like to slow things down to tell the viewer how Shia LaBeouf and his fictional parents are doing, the Dark of the Moon video game is focused squarely on the battle missions, which are jam-packed with non-stop action.

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