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.
要減少襍質含量和延長催化劑使用壽命，除需要充分注意原料氣中R值之外，還需注意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.
而慢充盈分數 (SFF) ,心房充盈分數 (AFF)卻相應增加。
The ratio of students to teachers is 35:1.
學生和老師的比率是三十五比一。
The ratio of schoolboys to schoolgirls is 2 to 1.
男學生和女學生的比例是2比1。
Men outnumber women here in the ratio of three to one.
此地男子數量以三比一超過女子。
The first or last term of a ratio or a series.
首項，末項比率或數列中第一個或最後一個項