头球

The effect of the friction moment of bearings on performance is researched. The forming mechanic and influence factors of the friction moment of ball bearing are analyzed. Suitable clearness and groove radius of ball bearings are obtained by experiment and calculation. The relationship between starting moment of ball bearing and various lubricants is analyzed. The measure for reducing the starting moment of ball bearing is put forward, it is the theory basis and reference for ball bearing design of small power unit system.The system is an unstable system when the 24-station ball pen tip production machine is running because of various interferences. It is too hard to describe the system by linear method, so the nonlinear formulation must be used.

研究了小动力头系统轴承摩擦力矩对运转性能的影响，分析了球轴承摩擦力矩的产生机理及影响因素，采用实验和计算的方法得到了动力头球轴承的合理间隙及球轴承沟曲率半径，分析了各种润滑剂与球轴承启动力矩的关系，并提出了减小轴承启动力矩的措施，为小动力头系统的轴承设计提供了理论依据及实践参考。24工位笔头加工机械在笔头的生产加工过程中，由于受到各种因素的干扰是一个不稳定系统，其稳定性会发生一定变化，而且很难用线性方法表述。

Even when he subs a target player for a right back we go on and win the game thanks to a 166cm tall player outjumping one of the better headers in England!

居然当他在用右后卫换下前锋的时候，一个1米66的小个子居然跳得比英格兰的头球好手还要高、让比赛最终获胜！

Trinidad and Tobago, which tied Sweden, nearly scored late in the first half, but defender John Terry made an acrobatic save at the goal line. Stern John headed a ball in the middle of the box that appeared on its way into the net in the 45th minute, only to see Terry clear it off the goal line while falling down.

整句话的意思是，在上半时比赛中，曾与瑞典队打成平局的特立尼达和多巴哥队差点攻破英格兰球门，幸亏英格兰后卫约翰特里在球门线上凌空解围——在第 45 分钟，斯特恩约翰在禁区中央头球射门，不想被特里把球踢飞，将其挡在球线之外。

He scores all types of goals – headers, finishes inside the six-yard box, volleys like tonight's– he's done really well so far.

他能用各种方式进球——头球，近距离进球，今晚这样的抽射——他目前为止干得很好。

The Reds went close when Spearing's clever header from a corner was hacked away in the six-yard box, but persistence was the key and the breakthrough came on 42 minutes when Dalla Valle pounced.

斯皮尔灵通过角球在小禁区内聪明的头球偷袭打开了小红军们的进攻欲望，但是知道第42分钟我弟的进球才彻底打破僵局。

It was our Serb's brilliant headed clearance three minutes into stoppage time that ensured the shut-out and the 1-0 win.

在那场比赛的最终，靠着塞尔维亚人在补时3分钟出色的头球解围化解了对方的进攻，我们保住了1比0的胜利。

The France captain rose in the box and powered a header from Figo's cross past goalkeeper Doni.

法国国家队队长在禁区内接菲戈传中，以一记强有力的头球洞穿了门将多尼的十指关。

Substitute Victor Karpenko floated a free kick into the box and Shatskikh rose to head goalwards.

替补出场的维克特卡朋克将任意球开到大禁区中，沙茨基赫跳起头球。

Yeah, we were on a putting green and the next thing you know there was a seven-iron and it came out of nowhere and it hit me in the head.

当时我们正在果岭上，接着你知道吗，不知从哪飞来一个7号铁头球棒，正好砸中我的头。

Sports An iron golf club with a very slanted face, used to lift the ball, as from sand.

楔形铁头球棒：一种打高尔夫球用的棒面倾斜的铁棒，用于把球如从沙地中向高空击起

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。