头的

The echolocation signals of Rhinolophidae and Hipposideridae are both long CF-FM with 1 harmonic and narrow FM bandwidth. But Rhinolophidae has longer duration, higher duty cycle and lower dominant frequency than Hipposideridae. All the echolocation signals of Vespertilionidae are short FM with 2-6 harmonics and wide FM bandwidth. Vespertilionidae has shorter duration and lower duty cycle than the other two families. There are obvious differences in dominant frequency between different species in this family.

菊头蝠科和蹄蝠科回声定位信号均为长CF-FM型，一般具有1个谐波，调频带很窄，但菊头蝠科的持续时间和能率环明显高于蹄蝠科，蹄蝠科能量最大处频率高于菊头蝠科；蝙蝠科回声定位信号均为短FM型，具有2～6个谐波，持续时间和能率环比其他两科低，调频带很宽，能量最大处频率在种间变化较大。

This device include: Renishaw's high-speed scanner (CYCLON SERIES2), the scanner can be laser-contact probe and probe each other's advantages, precision laser scanning for 0.05mm, contact scanning probe accuracy Up to 0.02mm.

这方面的设备还包括：英国雷尼绍公司的高速扫描仪（CYCLON SERIES2），该扫描仪可实现激光测头和接触式测头优势互补，激光扫描精度为0.05mm，接触式测头扫描精度达0.02mm。

When the trial was commenced, the pigs were starved for 5 hours before the run. All the 4 pigs in the whole group (1 with running experience and 3 without running experience) were racing at the same time, feed was placed at the ending. During the race, the time for the first half, second half and whole track, were recorded once.

於正式开始试验时，猪只在赛跑前先饥饿五个小时，其后全组之4头猪只（1头有赛跑经验和3头无赛跑经验）同时进行赛跑，并於终点处放置奖励之饲料，在猪只赛跑的过程中於跑道前段、后段及全程各纪录时间一次。

A cleaner includes a suction motor mounted in a cleaner main body, and generating a suction force; a filter for collecting dust or filth sucked by the suction force generated at the suction motor; a suction head connected with the filter by a suction tube, and sucking dust and filth on a floor; a brush installed in the suction head so as to ascend/descend in a vertical direction, and sweeping dust and foreign substances into the suction head; and a brush height control apparatus installed in the suction head, and making the brush ascend/descend in a vertical direction.

一种吸尘器，它包括安装在吸尘器主体内并且产生吸力的吸尘马达；收集由吸尘马达所产生的吸力吸入的尘土或污物的过滤器；通过吸尘管与过滤器连接的吸尘头，吸尘头吸入地板上的尘土和污物；安装在吸尘头内从而可以在垂直方向上上升/下降的刷子，它将尘土和异物扫入吸尘头；和刷子高度控制设备，它安装在吸尘头中，并且使刷子在垂直方向上上升/下降。

So researchers played a trick on the animals. They painted the heads of some red males black. Then they mated those seemingly black-headed birds with both red and black females.

他们把几只雄性七彩文鸟的红色头纹染成黑色，然后让这些看似有着黑色头纹的七彩文鸟分别与红色头纹与黑色头纹的雌七彩文鸟交配。

The expected life of new series of bit is 2 to 4 times of that of the chisel bit and button bit, and the price is only one fifth to one third higher than that of chisel bit and button bit.

新系列钎头寿命为一字、球齿钎头寿命的2～4 倍，而价格仅比同直径一字、球齿钎头高1／5～1／3。

Because of the lower rock fragmentation efficiency and defective geometrical shape of chisel bit, Sweden has replaced chisel bit with taper connecting cross chisel bit and button bit since the mid seventies.

中文摘要：因一字形钎头破岩效率低和几何形状结构缺陷等问题，瑞典从70年代中期就用锥体连接的十字和球齿钎头取代了一字形钎头。

The determination of high molecular weight impurities which existed in cefotaxime, ceftriaxone and ceftazidime and the influences of different ion-pair reagents; pH value of the eluants and the flow rate on the chromatographic column were discussed in detail.

以建立头孢噻肟、头孢曲松、头孢他啶中高分子杂质含量的快速测定方法为目的，对不同离子对试剂、洗脱剂pH、洗脱剂类型、离子对浓度、洗脱速度等因素进行了研究。

As the same time design variables,such as cutting head diameter, cutting first hand tap corner,rise angle of the helical blade,and so on,and subjection functions were discussed.

论文摘要：选择截割头钻进速度作为优化设计的目标，选取截割头直径、截割头锥角、叶片螺旋升角等作为设计变量，讨论了其隶属函数。

According to the principle of elasticity-viscoelasticity, equations of stress and strainfor EMP surface layer under the load of different indenters and indenter contact whilesliding were calculated separately. The indenters contain sphere, cylinder and taper.

粘弹性对应原则，计算出了受一般外形压头法向无摩擦力作用下和受球、圆柱平头、圆锥形压头法向载荷作用下，以及在滑动过程中相应压头形态接触作用下EMP表层的应力、应变方程。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了