突变压力

Based on the design of deepsea microplankton concentrated and gas-tight sampler, the following sampling techniques are lucubrated: pollution-free sampling technique, pressure-jump-free sampling technique and in-situ concentrated sampling technique; deepsea highprecision gas-tight sampling technique; sealing technique of superpressure seawater hydraulic system; reliability design technique of deepsea high pressure cabin.

论文以深海浮游微生物浓缩保压取样器设计为背景，对深海无污染无压力突变原位浓缩取样技术、深海高精度保压取样技术、超高压海水液压系统密封设计技术和深海高压密封舱可靠性设计技术进行了深入研究。

The flow field model of port plate pair in condition of the linear axial pressure distribution and dynamic model of flow divider pintle supporting system in abruptly variable load were established. Based on the two models, the balancing characteristics of flow divider pintle in ball piston pump was investigated.

在轴向压力线性分布的条件下，建立了配流副的流场模型，同时建立了配流轴支承系统在突变载荷下的动态仿真模型，在此基础上对球塞式液压泵配流轴的平衡特性进行了研究。

Adlay is a grass crop which has been used in traditional Chinese medicine and also as a nourishing food. It has been shown to posses anti-allergic, antimutagenic and hypolipemic effects. BaP is a known environmental pollutant which causes oxidative stress, carcinogenic and mutagenic compound. TBT is widely used as antifouling paints, agriculture biocides, and plastic stabilizers around the world, resulting in great pollution problem in aquatic environments.

薏苡仁属於草本植物，已经被使用在中药方面且也是一种食物，具有抗过敏、抗突变及降血脂的能力；苯骈芘是已知会提升氧化压力具有致癌及致突变性的环境污染物；而三丁基锡是被广泛添加在抗海洋生物的油漆、农业的杀虫剂及塑胶稳定剂里的成分，其在近年对海洋水生环境造成了相当大的污染问题。

The results of χ2 test showed that the frequencies of genotypes in different breeds were significantly different (P＜0.01).The frequencies of mutation genotypes in Yorkshire were significantly higher than Duroc and Landrace.According to the above results,we can speculate the difference of the frequencies of genotypes may be the results of long term choice pressure.

统计结果发现基因型频率分布与品种有关，大白猪突变基因型频率显著高于长白和杜洛克，本研究推测分布上的差异可能是由于长期的选择压力造成的。

It was found that there were no cor-relation between infection with precore mutants and s...

研究结果提示，突变株的产生可能与机体免疫压力的选择有关。

Recognizing that morphological change was the product of shifting gene frequencies, Fisher, Haldane and Wright developed sophisticated mathematical models to assess the relative effects of selectional pressure, mutation, and genetic drift on evolutionary change.

认识到形态变化的产物，是转移基因频率，费希尔，霍尔丹和赖特开发了先进的数学模型，以评估相对影响的选择性压力，突变，和遗传漂变的进化改变。

There aren't any pipe joints of integral valve, therefore it's not subject to pipe or bolt influence, pressure case will not be subject to "mutation" of pressure.

不带任何管接头的整体式阀体，因此不受管道或螺栓应力影响，并且由于阀体无任何管接头，故耐压壳体不会受压力&突变&的影响

The research target designs of backgroud of this paper is providing a kind of sampler that can collect Suspended Particulate Matter and plankton in the sea water in the specify deepth of sea without pollution and have no pressure mutation, and at the same time condenses these microorganism.

本文所处课题的研究目标是设计一种在供潜器使用、可以在深海指定水深处无污染、无压力突变地采集、浓缩海水中悬浮颗粒物和浮游生物的取样器。

For example, when passing at low altitude supersonic aircraft, when the head and tail of the aircraft will have the pressure and density of mutations through the surface formed after the N-shaped shock wave reflection, reached the ground sounds like explosions, this special sound of noise is called the H -.

例如，当超声速飞机在低空掠过时，在飞机头部和尾部会产生压力和密度突变，经地面反射后形成N形冲击波，传到地面时听起来像爆炸声，这种特殊的噪声叫做轰声。

The cusp catastrophe of connected well roof is analyzed by beam model considering the level stress contributed by the weight of strata and geological construction.

用平直梁尖点突变模型，并考虑了自重侧压压力及水平构造应力的综合作用力研究了连通井顶板的失稳突跳，得出了连通井顶板失稳的充要条件。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。