The methods for calculating the progressive rate of science and technology include two kinds:mathematical model method and index system method.

现代科技进步的速度愈来愈快，相关的法律规范的制定与完善很难赶上技术前进的步伐。

youdao

The progressive rate of the patients with increased urinary B_2 excretion was lower than the rate of those with decreased urinary B_2 excretion (12.5%; 47.1%).

核黄素营养水平提高的患者病情进展率12.5%低于核黄素营养水平降低的进展率47.1%。

youdao

Theoretical formulas were established by overall analysis to the progressive rate springs with variable arm length, and their results were obtained by experiment test.

通过对变撑臂渐硬性钢板弹簧的全面研究，推导出理论计算公式；通过试验测试，得到了试验结果。

youdao

With a sales tax, one year of extraordinary spending would at least be taxed at a flat rather than a progressive rate.

FORBES: Is a National Sales Tax Really Fair?

The result: The progressive rate structure of the federal income tax means income splitting combined with individual filing can only create marriage bonuses.

FORBES: Same-Sex Couples and Taxes

None inheres in the progressive rate structure.

FORBES: Alan Blinder's Accidental Case for the Flat Tax