The ratio of pupils to teachers was 30 to 1.

学和老师的比是30比1。

The column temperature can also influence the split ratio due to sample recondensation.

柱温在样品的再冷凝过程中也会影响样品的分流比。

To establish coefficient multiplying ratio spectrophotometry for determination of pyramidon andcaffeinein naoning tablet .

建立脑宁片中氨基比林和咖啡因的系数倍测定法。

The surface ratio of conus to disc was calculated using a planimeter.

我们使用面积计测量圆锥与视神经盘表面比值。

In the first phase, the oogonium has little cytoplasm and bigger nuclear-cytoplasmic ratio.

第1时相，卵原细胞细胞质较少，核质比较大。

Linguistic indices contain the ratio of error-free T-unit (REFT) and subordinate clauses per T-unit (SCT).

语言指标包括无错误T-单位与全部T-单位之比(REFT)和全部从句与全部T-单位之比(SCT)。

The Determination of Cyclopenthiazide by using the ratio absorption coefficient in UV-spectrophotometer was studied.

用紫外分光光度比吸收系数法进行了环戊噻嗪百分含量测定法的研究。

In the period of ectatic cataract,mature cataract or hypermature cataract,the relevant ratio of ultrasonography is 100%.

膨胀期、成熟期、过熟期超声的检出可达到100%。

The boron deficiency plant appears inter-venial chlorosis, thickening, crisping leaves and increased leaf weight ratio (LWR).

缺硼使叶重比(LWR)提高和叶片脉间失绿、变厚、变脆。

Dimethoxymethane possesses higher quantity of oxygen, higher ratio of hydrogen to carbon and lower flash point.

甲缩醛含氧量大、氢碳比高、闪点低，加入柴油中能够提高其十六烷值。

A new method of measuring the ratio of thermal emission rate to the photoexcitation constant is presented.

提出了在考虑吸收系数强度特性条件下一种测量热激发速与光激发常数比值的新法。

Its ratio of inapparent infection to apparent infection is about 100:1.

该病隐性感染与显性感染的比例约为100：1。

Research of the influences of Foam Expansion Ratio (FER) and the stability of foam to the cutterhead torque.

通过试验结果的分析,得出气泡稳定性以及发泡倍盘扭矩的影响规律。

To prepare RHR model by 2K1C and observe the ratio of the left ventricular weigh(LVW)and the body weigh(BW).

采用二肾一夹(2K1C)法复制RHR模型,观察血压和左心室重量(LVW)、LVW体/重(BW)比值。

The cross-section curvature ductility ratio for R.C inequiaxial T-shaped, L-shaped and cress-shaped columns is calculated by numerical method.

摘要采用非线性全过程数值分析法，计算了钢筋混凝土不等肢T形、L形和十字形柱截面模型在多种工况下的截面曲延性比。

So some renovations should be made,for example,increasing the solvent ratio of propane deasphalting;using hydrofinishing instead of clay treating;mo...

增加丙烷脱沥青的溶剂比,用加氢补充精制代替白土精制等,此外,在含硫原油产基础油时,原油也应适当选择。

Conclusion The infestation ratio and the ectozoa index of these hosts were lower with the exception of hedgepig.

结论除刺猬外，各鼠种染虫和染虫指数较低。

A high K ratio method for fatigue precracking in welding position toughness specimen of thick steel plate was developed.

提出了预制厚钢板焊缝断裂韧度试样疲劳裂纹的“高K比法”。

It is suggested that the specific speed would be replaced by diametric ratio,and the new nameplate would be used.

建议比转速应为直径比所取代,并启用水斗式水轮机新铭牌。

Aluminium electrlysis by means of low molecular ratio electrolyte is an important mark for centre-worked prebake cell at present.

摘要采用低分子比电解质进行铝电解产是现代中间下料预焙槽的重要标志。