性比

氯化镉对小鼠和牛的雄性配子生殖及性比的影响

Effect of CdCl_2 on Sperm Toxicity and Sex Ratio in Mouse and Bovine

高温而少雨，可能是导致夏季社鼠种群数量下降和性比波动的原因之一。

The high temperatures and drought might lead to the population decline and the fluctuations of sex ratio in summer .

创造力和独创性比专门技术更为重要。

Creativity and originality are more important than technical skill .

一些发言者认为拳击的危险性比橄榄球运动小。

Some speakers argued that boxing was less dangerous than rugby .

六倍体野生桑与二倍体栽培种远缘杂交F1代性比表现

F_1 Sex Ratio Expression of Hexaploid Wild Mulberry × Diploid Cultivated Mulberry

但对F1代性比无影响，对F2代性比略有影响。

A slight effect on sex ratio of F_2 was found , but no effect on that of F_1 .

流量的局部性比WWW和FTP应用相比更不明显；

The locality is less evident than that of WWW and FTP ;

同时观察到掺钛LiAlO2晶体的抗水解性比纯LiAlO2晶体更好，因为掺钛LiAlO2晶体有更多的Li空位，水解的活性得到降低。

Because more Li vacancies in Ti : LiAlO_2 crystal made the ability of hydrolytic reduce , Ti : LiAlO_2 crystal had stronger anti-hydrolytic property comparing with pure LiAlO_2 .

长期饥饿状态对鲫鱼Carassiusauratus性比的影响

The influence of prolonged starvation upon the sex-ratio in the goldfish , carassius auratus

接枝复合乳液中VAE与PA的相容性比共混体系有了较大提高。

The compatible of VAE and PA in the composite emulsions is better than the blending system .

抗组蛋白抗体的阳性反应性比抗dsDNA抗体反应高，且出现较早。

The high level maintained at least for 4 months . The positive reactivity of antibody to total histones was greater and occurred earlier than that to ds DNA .

S-SBR在甲苯中的溶解性比在THF中好。对S-SBR在甲苯溶液中的形态作了初步探讨。

The morphology of S-SBR in toluene solution was discussed .

TGA结果表明，共聚物的耐热性比两种均聚物的耐热性无论是在氮气氛还是空气氛下都要好。

TGA results suggest that the thermal-resistance of the copolymers is higher than that of homopolymers both in the nitrogen and air .

在被Zn2＋污染了的镀镍溶液中加入甘氨酸.可获得含有少量Zn的Ni－Zn合金电沉积层，其沉积层的耐蚀性比纯Ni沉积层更好。

When glycine was added to the nickel plating solution polluted by Ni2 + , Ni-Zn alloy deposit was obtained , it contained a little zinc and its properties of anticorrosion was better than pure nickel deposit .

室内腐蚀挂片试验和电化学性能测试结果表明，低磁钢的耐蚀性比3C钢要差；

The result of laboratory exposure test and electrochemical test indicate that the corrosion resistance of low-magnetic steel is worse than that of 3C steel .

本试验通过RAPD技术测定蜂王交配次数，并利用亲属选择和性比理论，研究了蜂群中的性比冲突问题。

In this paper , we calculate numbers of drones mating queen by RAPD analysis and use theory of kin selection and sex ratio , to study the conflict of sex ratio in colony .

结果表明，该控制器自整定能力及鲁棒性比传统PID控制器更强，响应速度快、精度高，同时对虚假水位有较好的控制效果。

The result shows that the self-adapting ability and robustness of the fuzzy controller are better than that of the traditional PID controller . The controller has high accuracy and fast response , which can effectively control the false water level .

而且大部分合并DN的1型糖尿病患者多提前死于心血管疾病，其危险性比未合并者高20～40倍。

Most of the type 1 diabetic patients with DN will die of cardio-vascular diseases in advance , the danger of whose is 20 - 40 times as much as those without .

采用Ni-Cr合金桩核牵引后制作烤瓷冠修复同采用不锈钢丝制作临时桩牵引后再制作桩冠修复体相比，后者的桩核与残根断面的密合性比更好；

Compared with permanent post and core groups by Ni-Cr alloy , the seal of core and root is better in the temporary post groups by stainless steel group .

结果表明PTT短纤维具有优良的弹性和柔软度，其断裂伸长和弹性回复性比PET纤维高得多，一次拉伸回复和10次反复拉伸的总弹性回复率均高于PET纤维。

The results show that PTT staple fibers have good elasticity and softness , and its breaking elongation and elastic recovery rate are higher than that of PET fiber , which is proved by single-extension recovery experiment and ten-extension recovery experiment .

制备的PEG-HMS复合材料的热稳定性比PEG有所提高。复合材料PEG-HMS的细胞相容性比HMS有所提高，且没有毒性。

Thermal stability of PEG-HMS composites increased compared to the PEG Cell compatible of PEG-HMS Composite improved compared to HMS , and it is no toxicity .

结果表明，巢内CO2体积分数和湿度环境因素改变，引起群内15&20日龄工蜂保幼激素含量提高和血淋巴中K+/Na+降低，从而使蜂群表现出调控蜜蜂性比行为。

The results showed that the changes of temperature and concentration of CO2 in colony could heighten juvenile hormone and depress of K + / Na + in 15 ~ 20 day ages worker honeybee , thereby the colony had behavior to control honeybee sex ratio .

克隆文库和TGGE的研究结果一致，均表明注水井样品的微生物多样性比采油井丰富很多。

The results of TGGE and clone library profiling analysis both indicated that microbial community of the WW had higher diversity than the OW .

Ti-N合金元素共渗层磨损曲线较平稳，平均摩擦系数较小，耐磨性比Mo-Cr共渗层要好。

The abrasion curve is the most stable . So the wear resistance of Ti-N alloying layer is better than that of Cr-Mo alloying layer .

还考察了Ni&P合金镀层的摩擦学性能，发现用基础油润滑时，Ni-P合金镀层的耐磨性比45钢提高6.2倍，但摩擦系数却高出20.35%。

The tribological properties of Ni - P alloy coating are examined . The results show that the antiwear of Ni - P alloy coating is 6 . 2 times greater than medium carbide steel , friction coeffcient increased by 20.35 % .

不仅如此，新型高速列车如CRH，其列车的密封性比以往列车更好，这进一步增加了无线信号传播至列车内的难度。

Moreover , the tightness of the carriages of the new high-speed trains such as CRH , is better than the previous trains , which makes it more difficult for the wireless signals propagating into the train .

电化学方法和失重法研究表明，锌铬涂层在NaCl溶液中的耐蚀性比普通镀锌高出7倍左右；在NaOH溶液中的耐蚀性能与镀锌大致相同。

The corrosion resistant of Zn-Cr coating is 7 times as high as zinc plating in the solution of 3.5 % NaCl , and in the solution of 3.5 % NaOH is same as zinc plating with the study of electrochemical technique and weight losing method .

本文第二章引入了一个类似于Malthus指数增长规律的模型，此模型可以存在一个全局稳定的两性指数解，但是种群的性比是趋向稳定的；

In the second chapter , a model similar to Malthus analogy is introduced , which supports an exponential solution which is globally asymptotically stable ; however , the sex ratio is stable .

研究了PTT长丝的力学性能和热性能，并与其他长丝进行了比较，结果表明PTT长丝具有优良的弹性和柔软度，其断裂伸长和弹性回复性比其他长丝好。

The article studies the mechanical and thermal properties of PTT filament by comparing it with other filaments . The result shows that PTT filaments is of good elasticity and softness with its breaking elongation and elastic recover rate higher than that of other filaments , especially PET .

结果表明，PAS12起泡剂几乎不在油砂上吸附，起泡性比常用的SDS和ABS强，70℃下溶液浓度为0.20%时，起泡高度可达180mm以上；

Results showed that the foamer PAS-12 scarcely adsorbs on the oil sand surface and the foaming ability is better than that of SDS and ABS . At 70 ℃, when the PAS-12 content is only 0.20 % , the foam height is more than 180 mm .