轮

On the base of simply introducing running transmission mechanism of shearer,according to the theory of rack and pinion engagement,mainly analyses impact cause resulted from toothing between shearer involute sprocket and conveyor pin-rail ,using the specific parameters.

简单介绍了目前大功率采煤机的行走传动装置，并结合某采煤机渐开线行走轮和输送机销排销齿的具体参数，按照齿轮齿条啮合理论，分析了此渐开线行走轮和销齿啮合产生冲击的原因之一。

Through the measures of increasing towboat thrust, improving manoeuvre performance of towboats and reducing barges and load of a fleet etc.

采用增加推轮推力，改善推轮操纵性能和减驳减载等改进措施，可将两坝间河段的通航流量级由上水的2万立方公尺/s提高到4.5万立方公尺/s。

According to the navigational conditions of the ship lock entrance transitional channel, the fleet mix and the towboat power in Naji Hydro-junction, the ship resisitance was calculations and compared with the towing force, and the navigation conditions of transitional channel was analyzed as well.

根据那吉航运枢纽船闸口门外连接段的水流条件、舶合及推轮功率，计算了船舶航行阻力，并与推轮推力比较，分析了连接段的航行条件。

The results show that compared with the uninoculated pear fruit, the PPO activity of the pear fruit inoculated by the pathogen markedly increase in 48 hours after the inoculating treatment, the PAL activity is on the rise during the 120 hours after inoculation, POD and CAT activities reach a peak at 72h after inoculation, and the SOD activity of the inoculated treatment is also obviously higher than that of the contrast, which suggests that those enzymes are closely-related to pear fruit against Botryosphaeria berengriana f.sp.

结果表明：鸭梨果实中多酚氧化酶活性在接种轮纹病菌48 h内显著高于对照，苯丙氨酸解胺酶活性在接种120 h内一直呈上升趋势，过氧化物酶和过氧化氢酶活性在接种后72 h出现活性高峰，超氧化物歧化酶活性在接种后120 h内也显著高于对照，说明这些酶对鸭梨果实抵抗轮纹病密切相关。

The numerical results show that:(1) the throughflow wake is considerably influenced by the tip clearance. The low-kinetic-energy fluid accumulated in the shroud/pressure side of the unshrouded impeller, but in the shroud/suction region for 0.0 tip clearance;(2) there possibly exists an optimum size of the tip-clearance which is not the zero tip clearance to make the flow loss minimized.

研究结果表明，(1)NASA低速大尺度离心压缩机半开式叶轮的低速尾迹区在压力面与轮盖的角区，而相应的闭式叶轮的低速尾迹区聚集在轮盖的中心位置；(2)数值实验表明，叶顶间隙并非越小越好，可能存在一个最优间隙，使得叶轮流动损失最小。

On September 28, 2001, Feng Chuangjia, one of the core members of the Falun Gong underground organization, fabricated a long reactionary article that vamped up the so-called truth in lockups, stigmatized the Party and national leaders, and attacked the right decisions about the ban on Falun Gong by the government.

2001年9月28日，&法轮功&地下组织骨干分子冯传家炮制了一份数千字的反动文章，捏造所谓看守所真相，诬蔑党和国家领导人，攻击国家取缔&法轮功&的正确决策。

Leaves verticillate and alternate apically on stems, verticillate basally on old stems

轮生和互生的叶顶部在茎上，基部在老茎上轮生 87 S。 dimorphophyllum 二型叶景天

Zapatero held his own in the first televised debates between the two men, and won the second.

大家一致认为萨帕特罗在第一轮电视辩论中表现出色，并会在第二轮中取胜。

The change for substitute group on chlorin ring of chlorophyll-a derivative and the effect on their visible spectra is discussed and summarized according to relation of electron effect and substituted position of different groups with conjugated region.

根据不同取代基的电子效应、取代位置与分子共轭区域的联系，提出二氮杂轮烯和四氮杂轮烯组成的非等原子芳香体系结构，总结了卟吩大环上的化学结构变化对其可见光谱的影响。

During the call-back week, the judges will choose the Top 20 dancers who will continue in the competition.

在为期一周的第二轮选拔中，评委们将选出前20位选手进入下一轮比赛。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。