axial compression ratio and slenderness ratio  轴压比和长细比

B-C ratio (benefit-cost ratio)  边界代表

benefit-cost ratio (B-C ratio)  损益平衡点

focal ratio (=focal-length ratio)  焦比

grinding ratio(G-ratio)  磨削比

maximum ratio combing according to signal to noise ratio  基于信噪比最大比加权

recirculation ratio recycle ratio  压力调节阀

recycle ratio recirculation ratio  经济回流比

signal-noise ratio (=signal-to-noise ratio =SNR)  讯噪比

stop ratio and start ratio in time segment  时段停车率和时段启动率

price--earnings ratio;P/E ratio  市盈率; 市价盈利率

addition of taxa  分类群增补

Arboreal taxa diversity  森林植物多样性

Correlation of soil taxa  土壤分类参比

decreasing taxa  衰落中的生物分类群

higher taxa  高级阶元

Lazarus taxa  复活分子

new recorded taxa  新记录

new taxa  新分类群; 新类群; 新种; 新记录; 新种属; 新分类单元