催化剂用量与反应速率常数呈二次抛物线关系；
The relation between the photocatalyst dosage and the antibacterial rate constant was assumed to be a parabola equation.
底部内区流速分布可用对数公式表示；外区和表面区可用二次抛物线公式表示。
Velocity distribution can be expressed by a logarithmic formula for the inner zone and a parabolic formula for outer and surface zones.
单株穗数、穗粒数和千粒重随密度增加而下降，籽粒产量与密度呈二次抛物线关系。
The number of ears per plant, the number of kernels per ear and 1000-kernel weight decreased as density increased. Grain yield and density showed a quadratic parabola relationship.
二次抛物线模型曾广泛应用于养分效应的研究，然而这种对称模型与多数情况不符。
The quadratic parabola model was once widely used to study the effects of nutrients. Such a symmetric model, however, does not accord with the practical situation in most cases.
认为在一定锚固预应力作用下，梁底反力沿梁长呈二次抛物线分布，而直线及均匀分布。
It is put forward that under a definite prestressed force, the distribution discipline of the counterforce along the length of beam is quadratic parabola rather than linear or uniform one.
本文根据载荷沿齿向按二次抛物线分布的规律导出了齿向载荷分布系数的计算式，并由此给出了该系数的数值及相应的曲线。
Formulae for computing the longitudinal load distribution factors are derived on the basis of parabolic load distribution and the factors are calculated with the curves plotted.
提出一种采用二次抛物线来拟合温度—密度曲线进行饱和蒸汽的流量补偿的方法，并且用MCS-51单片机进行数据处理。
This paper presents a method of flux compensation of saturated vapor. This method adopts parabola fitting the curve of temperature-density and deals with the data by MCS-51 single-chip computer.
非设计工况下流道的水力损失恒大于相同流量时设计工况下的水力损失，左侧的水力损失大于右侧的水力损失，且不符合二次抛物线变化规律。
The head loss of the left side is always greater than that of the right side, and the head loss curves don't comply with the second order parabolic law.
这是一个x的二次方程，也是一个抛物线方程式,抛物线都长这样。
It's a second-order equation in x, and is a parabola and a parabola has this shape.
抛物线曲线对应一个二次方程序曲线。
径流含沙量与土壤前期水分之间的关系呈近似一元二次方程抛物线变化，荒漠草原坡面土壤流失最少的前期最优土壤含水量值为17.5%。
The relationship of sediment content and antecedent soil moisture showed the parabolic trend. In desert grassland, the soil moisture is 17.5% in the early time of surface soil loss.
本文提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线轨迹是一个直纹四次曲面，并讨论了二次曲线分别为椭圆、双曲线和抛物线时，形成的曲面的形状特征。
In this paper, it is presented that the locus of a line crossedwith each of two guide lines and a guide conic not being on a commonplane is a ruled surface of fourth order.
本文提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线轨迹是一个直纹四次曲面，并讨论了二次曲线分别为椭圆、双曲线和抛物线时，形成的曲面的形状特征。
It is presented that the locus of a line crossed with each of two guide line and a guide conic not being on a common plane is a ruled surface of fourth order.
本文提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线轨迹是一个直纹四次曲面，并讨论了二次曲线分别为椭圆、双曲线和抛物线时，形成的曲面的形状特征。
It is presented that the locus of a line crossed with each of two guide line and a guide conic not being on a common plane is a ruled surface of fourth order.
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