...，小幅增加；豆粕期权主力月份M1709期权隐含波动率变化至15.43%，与前一交易日相比略有上升；成交量的看跌/看涨期权（P/C Ratio）比率略有回落，为87.57%；持仓量的看跌/看涨期权比率为77.68%，连续六个交易日小幅降低。
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atomic c ratio 原子比
T-C ratio 压拉比
clastic c ratio 碎屑比
dichroic c ratio 二向色性比
acoustic c ratio 声学比
anharmonic c ratio 非谐比例
C N ratio 碳氮比
c-g ratio 重心比
Serum T, C, and T/C ratio reduced more or less during training at sea level.
血清T、C、T/C值在下高原后有不同程度的降低，但无显著性差异；
Objective To investigate the diagnostic value of LDL-C/HDL-C ratio in coronary diseases.
目的探讨LDL-C/HDL-C比值在粥样硬化性冠脉疾病辅助诊断中的应用价值。
The curves of the normal mean values of urinary E_3 and E_3/C ratio from 20th to 42nd weeks of gestation were established.
经测定肌酐值校对的尿标本基础上，建立了本院实验室正常妊娠20～42周各孕周E_3值及E_3/C比值的均数曲线。
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