R-ratio

常见例句

To reduce the impurities and prolong the catalyst life, it is necessary to pay attention to the R ratio (H2-CO2/CO+CO2), CO/CO2 ratio and CO2 content.
要减少杂质含量和延长催化剂使用寿命，除需要充分注意原料气中R值之外，还需注意CO/CO2之比值和CO2的含量。
R ratio to total posterior wall excursion(R/PWE) was also decreased,while the slow filling fraction(SFF) and arterial filly fration(AFF) were increased correspondingly.
而慢充盈分数 (SFF) ,心房充盈分数 (AFF)却相应增加。
The ratio of students to teachers is 35:1.
学生和老师的比率是三十五比一。
The ratio of schoolboys to schoolgirls is 2 to 1.
男学生和女学生的比例是2比1。
Men outnumber women here in the ratio of three to one.
此地男子数量以三比一超过女子。
The first or last term of a ratio or a series.
首项，末项比率或数列中第一个或最后一个项