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1·Compared with other types of open channel cross-section, the cubic parabola shape open channel is one of the open channels which convey water more efficiently.

与其他形式断面渠道的比较结果表明，立方抛物线形断面渠道也是一种水力较优的输水渠道。

2·The geometry of turnout of France and Germany is described. It is pointed out that cubic parabola has been a development direction of geometry of the big number turnout.

论文介绍了法国和德国的线型，指出采用三次抛物线线型已成为大号码道岔线型的发展趋势。

3·Statistics showed that the time-effect models are parabola functions with maximum values when the mussel population density ranges from 6.25 to 31.25 per cubic meter.

研究发现，当蚌密度在每立方米6.25个到每立方米31.25个的区间内，时效模型呈具有极大值的抛物线函数。