变化球

螺旋球是最难投的变化球，因为它与胳膊在投球时的自然运动相反。

The screwball is the most difficult breaking ball to pitch , as it goes against the natural arm motion of the pitch .

你会投出长眼睛低位变化球。

You get a ground ball with eyes .

电阻变化对球墨铸铁的疲劳损伤比较敏感；

The change of electrical resistivity is very sensible to the fatigue damage of ductile cast iron .

因此研究他们间的距离计算及位置关系也变得十分有意义。管道曲面是指一个半径变化的球沿某一空间曲线运动，所形成的包络。

Consequently , the research of distance computation and position relationship is very useful . A canal surface is the envelope of a one-parameter set of moving spheres .

根据这个规律，可以计算出临界损伤变量为0.45；电阻变化对球墨铸铁的疲劳损伤比较敏感；

On the basis of this law , the critical damage variable can be calculated , that is 0.45 . The change of electrical resistivity is very sensible to the fatigue damage of ductile cast iron .

通过在时间域上和空间域上进行积分，建立热源强度随时间变化的球域热源情况下的数值积分求解方法，给出温度场作用下多孔介质内水分迁移的演化规律和分布特征。

With integration in temporal and spatial domains , a calculation method of heat-induced moisture movement in the vicinity of a spherical heat source with variable intensity with time is established . The moisture transfer characteristics with time and moisture distribution within the porous medium are illustrated .

导电率随时间变化的导电球的电磁响应问题

Electromagnetic response of conducting sphere with time - varying conductivity

乒乓球规则的变化对乒乓球运动产生影响的研究

On the Effects of the Contest Rules Change on Table Tennis Athletics

从世界排名的变化看乒乓球技术的发展方向

Watch the developing direction of table tennis technology from the change of world ranking

从近期规则的变化看乒乓球运动发展的趋势

Tendency of development of table tennis match seen from the changes of the recent rules

同时籍着变化右膝奔球而去的速度不同，他可以控制触球时的力量的大小。

By running his knee at the ball at different speeds , he was able to control the amount of force he expended through impact .

在固溶中期（250～400min），其形貌没有发生显著变化，仅球化程度更高；

In the middle solution stage ( 250 to 400 min ), the eutectic Si morphology has no significant change , only the degree of spheroidizing becomes higher ;

郁金香在河北坝上高寒区风干室自然贮藏，室温变化适合种球发育需求。

In natural store in airing room of Bashang High Cold Region of Hebei , the growth requirement of tulip bulb was adapted to the change of room temperature .

文中导出各稳态运动的稳定性判据，并讨论进动角速度的变化对刚球全局运动特征的影响以及由此产生的分叉现象。

Using the obtained stability criteria of various stationary motions , the influence of the precession speed to the character of global motion and the phenomenon of bifurcation can be discussed .

化学成分变化对铸铁管球化品质影响的研究

Influence of Chemical Composition Change on Spheroidization Quality of Ductile Iron Pipe

利用所揭示的规律与有关参数，可以跟踪球应力的往返变化，计算相应球应变的变化，计算结果与试验结果吻合较好。

Using the revealed law and related parameters , the volumetric strain can be calculated by following spherical stress change and the calculation results are preferably consistent with those by experiment .

我也很着急，因为那个时候任何的变化甚至是丢球都会给热刺一个反扑的机会。

That 's why I got frustrated because I felt it was important for the team not to concede a goal because any goal with what happened recently could have maybe caused a resurgence for Spurs .

目的：研究嗅球、嗅束动脉的来源分布及相关动脉的病理变化，为嗅球、嗅束因缺血所致嗅觉障碍提供形态学依据。

Objective : In order to provide morphological evidences for olfactory defect cased by olfactory bulb , olfactory tract ischemia , the origins , numbers , distributions and pathological changes about olfactory bulb , olfactory tract arteries were studied .