使发生

Suppression of recombination is the prerequisite for plant sex chromosome evolution from a pair of autosomes. Recombination suppression around the locus controlling sex determination results in sex chromosome degeneration and differentiation.

重组抑制是植物性染色体由常染色体进化而来的前提条件，性别决定位点区域发生的重组抑制使早期的性染色体发生了退化和分化。

I wonder if I could, Go back to old Hollywood When presidents dropped blonde bombshells Instead of creating the perfect hell The way we're living makes no sense Take me back to the age of innocence I wanna go back then Take me back to the age of innocence Back to the age of innocence When pharmaceuticals were there to make life beautiful When the way that we were born was more than suitable When everybody thought they could make a difference And you couldn't get your pics within an instance I wonder if I could, Go back to old Hollywood When presidents dropped blonde bombshells Instead of creating the perfect hell The way we're living makes no sense Take me back to the age of innocence I wanna go back then Take me back to the age of innocence Back to the age of innocence I wanna get older, don't fight my age Take me back to those simpler days I wonder how it all happened I wanna get older, don't fight my age Don't wanna be the shade of a scalpel's blade So please tell me, please tell me What ever happened?

我想如果我能，回到旧好莱坞当总统下降金发弹壳而不是创造完美的地狱我们的方式生活是没有意义的带我回到纯真时代我想回去，然后带我回到纯真时代回到纯真时代当药品在那里，使生活美好当我们出生的方法是适合多当大家都以为他们可以发挥作用而且你不能得到一个实例在你的照片我想如果我能，回到旧好莱坞当总统下降金发弹壳而不是创造完美的地狱我们的方式生活是没有意义的带我回到纯真时代我想回去，然后带我回到纯真时代回到纯真时代我要变老，不要打我的年龄带我回到那些简单的日子我不知道这一切是如何发生的我要变老，不要打我的年龄不想成为一个手术刀刀片阴影所以，请告诉我，请告诉我没有发生什么？

According to expert analysis, the occurrence of fish floating head and adverse weather conditions have a close relationship (In addition, the occurrence of fish have been floating with the water quality of manure, fish have been closely related), in hot weather, low air pressurethe adverse weather, often hypoxic water, the fish floating head.

据专家分析，鱼发生浮头与不利的气象条件有着密切的关系（除此之外，鱼发生浮头还与水质过肥、鱼苗过密有关），在天气闷热、气压低、连日阴雨的不利天气，往往使水中缺氧，鱼儿浮头。

Combined with the macro-morphology appearance analysis and working conditions of failure casing, the paper reached a conclusion that it is due to the impact and friction which come from the drill tools made the fatigue cracks formation on the casing thread root, and eventually leading to casing rupture failure, the material defects in failure casing accelerated crack initiation and growth.

摘 要：某井在钻井作业过程中，发生了上层Φ244.5 mm技术套管断裂失效事故，为了分析事故原因，对失效套管材料的化学成分、金相组织和力学性能进行了检测分析，结合套管失效形貌的宏观分析和套管使用过程中的现场工况分析，得出了套管螺纹发生断裂失效的原因是钻具对套管的撞击、摩擦，使套管螺纹根部产生疲劳裂纹，最终导致套管断裂失效，失效套管的材料缺陷加速了裂纹的萌生和扩展。

It can also reduce the handover frequency, hold the continuity of the correspondence and make the load of MAP balance when handovers occur.

这个模型是通过使用非固定的MAP域管理，针对单一移动节点的逻辑管理域，解决移动节点在域间切换和域内切换时的通信延时问题以达到降低切换行为的发生频率、保持切换发生时通信的连续性、使MAP负载均衡等目的。

The effects of spent culture supernatant on the adhesive ability of heat-killed Bifidobacterium were also studied. Results Bifidobacterium had good adhesive abilities to HT-29 cells.

双歧杆菌粘附于肠黏膜上皮细胞是其发挥作用的首要条件，粘附作用发生后形成的生物屏障阻止了致病菌的入侵和定植，使肠道菌群得到改善，从而抑制了多种疾病的发生。

Wheares under buffer pH5.2, there is no strong static electricity and instead being a longer wavelength movement; SDS\'s participation just restricts the relative movement of heme\'s ethylene; a new fluorescent peak forms and the reduction of enzymatic activity is due to the packing of micella\'s formation.

强变性的阴离子表活剂SDS与带净正电荷和弱负电荷的SBP(处于pH2.6和4.2缓冲液中)有强烈的静电力作用，酶活力丧失，二级结构变化，荧光强度增加，特征Soret发生蓝移，卟啉环的π-π*共轭的分裂能增大；而当SBP带净负电荷(pH5.2)时，没有静电吸引力，Soret带发生红移；SDS的引入只是限制了血红素上乙烯取代基的运动，使其与卟啉环共轭：极性环境的变化导致产生新的荧光峰；酶活力因胶团包裹作用而有下降。

The morphological analysis and chemical characterization of the worn surfaces via scanning electron microscopy, laser scanning microscope, and X-ray photoelectron spectroscopy reveal that under titrimetric water lubrication, the hBN in Si3N4-hBN spalled off during the wearing tests and the spalled pits formed on the wearing surface of Si3N4-hBN, and then the debris dropped into the pits to react with water, thus a tribochemical film formed on the wearing surface. The formation of the tribochemical film facilitated smoothing the surfaces of Si3N4-hBN and Si3N4 to create a fine lubrication environment.

在滴定法水润滑条件下，磨屑不易被水带走，当Si3N4-hBN与Si3N4配副摩擦时，由于Si3N4-hBN摩擦面上hBN偏聚区域发生脆性断裂和剥落而形成剥落坑，磨屑在剥落坑中堆积并氧化、水解，反应产物富集于剥落坑中，进而在摩擦表面形成含B2O3和SiO2的摩擦化学反应膜，从而保护了Si3N4-hBN和Si3N4摩擦面，使其变得光滑，为发生流体润滑提供了条件。

Frozen trimming machine, is a principle of making use of liquid nitrogen refrigeration plastic, rubber, aluminum-magnesium die-casting products, zinc fly side embrittlement happen quickly in this state, high-speed jet of plastic bullets fly percussive edge products, which not only can be highly efficient, high quality rubber products to remove fly edge products while maintaining the characteristics of itself does not change the nature of a trimming device.

冷冻修边机，是一种利用液氮冷冻原理使塑料、橡胶、铝镁锌压铸制品的飞边迅速发生脆化，在此状态下，高速喷射出塑料弹丸撞击制品的飞边，从而既能高效率、高质量地去除橡塑制品飞边同时又能保持制品本身性质特点不发生改变的一种修边设备。

Fourth, to avoid breaking material: Screw must not be allowed in the case of blanking operation, upon occurrence of the stator as dry friction of rubber, produces instant heat and burn, so good grinder, screw grille flow is a necessary condition for normal operation To this end, some screw pump body is also expected to stop off device installed, when there Fracture, because he has a self-priming screw pump function of the characteristics Chemical pumps of the body will produce a vacuum chamber, vacuum screw pump will stop operation.

四、避免断料：螺杆泵决不允许在断料的情形下运转，一经消防泵发生，橡胶定子由于干摩擦，瞬间产生高温而烧坏，所以，粉碎机完好，格栅畅通是螺杆泵正常运转的必要条件之一，为此，有些螺杆泵还在泵身上安装了断料停机装置，当发生断料时，由于螺杆泵其有自吸功能的特性，腔体内会产生真空，真空装置会使螺杆泵停止运转。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。