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.
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