无齿

Among the designs left by Leonardo da Vinci almost 500 years ago—with notes written backward to be read with a mirror—were the parachute,life jacket, water pump,swim fins,Well digger,paddle－wheel boat,horseless carriage ,sprocket chain, steam gun, water turbine,lens-grinding machine,shrapnel ,machine gun, airplane, helicopter,submarine,and mass production.

近500年前列奥纳多·达·芬奇留下的许多设计稿——即须通过镜子才能读懂的反着写的笔记，其中有降落伞、救生衣、水泵、游泳脚蹼、钻井机、明轮机、无马马车、扣齿链、蒸汽枪、水轮机、磨镜片机、子母弹、机关枪、飞机、直升飞机、潜水艇和成批生产的设计。

Idlers use stamped bearing house. Using wide clearance bearing and multi-layer labyrinth seal improves service life, reduces rotation resistance and friction coefficient. Cast welding and keyless connection has been used for pulley, Hydraulic coupling and hard surface cone cylinder gear speed reducer for drive unit, angle type structure for head frame, so these improve starting performance, drive efficiency, load capacity and service life, reduce floor area and weight of equipment.

托辊采用了35°槽型前倾结构，辊子为冲压轴承座结构，大游隙轴承和册层迷宫密封，提高了寿命，降低了旋转阻力和摩擦系数，滚筒采用了铸焊结构和无健联接，驱动单元采用了液力耦合器和硬齿面圆锥圆柱齿轮减速机，头架采用角型结构，从而改善了启动性能，传动效率，承载能力和使用寿命，减少了占地面积和设备重量。

In an experiment with mice, the researchers identified and removed certain receptors on the olfactory bulb of their brains -- and the result was a batch of fearless rodents.

在一个老鼠实验中，研究者们定位并取走了老鼠大脑中相对应的嗅觉球状体--结果便是产生了这批英勇无惧的啮齿类动物。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。