根据初步估算，早些的交易中道琼斯工业指数下跌323点，结束交易时，损失不到300点。
The Dow Jones industrials, down more than 323 points in earlier trading, ended the day with an advance of just under 300 points, according to preliminary calculations.
本文根据空气和水的性质，考虑相似准则，初步估算出物体受相同荷载情况下，两种物质的流速关系。
Based on the characteristics of air and water, and with the rule of similarity, initially we estimate the relationship of speeds of the these two objects under the same loading case.
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