这种结合不对称、解剖学和偶然性的进化论机制并未提供一种充分的解释，以说明蜗牛的右旋何以会成为主要的旋向。
This evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant.
水轮机旋向为俯视顺时针。
The turning direction of this water turbine is overlook clockwise.
驱动桥有两种旋向，可依用户需求供货。
The axle has two kinds of steering to meet the needs of different different users.
本文详细研究了不同旋向楔横轧成形螺旋面在不同坐标下的方程。
The equations of different helix in cross wedge rolling in different coordinates were studied in this paper.
当蜗轮蜗杆的交错角为时，还需保证，而且蜗轮与蜗杆螺旋线旋向必须相同。
When the worm crisscross Angle, still need to ensure that's too, and worm gear and worm helical screw to must be identical.
利用多边形外角定理的推广，判断偏置后曲线多边形的旋向，删除多余多边形。
Utilizing the extension of the polygon exterior angle sum theorem, directions of curvilinear polygons were judged and redundant polygons were deleted.
内装式、单端面、单弹簧、非平衡型，带钩弹簧传动，弹簧旋向与轴旋向有关。
It is of built-in type, single seal face, single spring and unbalanced type with hook spring transmission, and the direction of rotation of spring depending on that of axis.
为了满足安装的要求，对国产齿轮泵的旋向、内油孔位置和花键轴等进行了改造。
The revolving direction, internal oil hole position and spline shaft of the domestic pump are modified to meet the installation requirement.
本文主要介绍双桨浅吃水肥大船尾型、伴流场与螺旋桨旋向配合研究的主要结果。
This paper describes primarily the results of the research on the combination of stern shape, wake field and propeller rotation direction for a shallow draft full ship model.
由于每根螺杆两端螺纹的旋向相反，螺杆转动时，由螺杆啮合线形成的泵工作腔。
Because each thread rotate to the opposite on both ends of the screw, the screw rotates, formed by the screw meshing line pump working chamber.
这两根螺旋纤维经常在相同螺旋圈数的位置同时发生螺旋旋向的改变，即螺旋反转。
The two helical nanofibers usually change helical senses (helical reversals) at the coil position of the same cycle number.
它们具有绝对相反的螺旋旋向，但却具有相同的纤维直径，纤维截面，螺旋直径，螺旋圈数，螺旋间距，和螺旋长度。
The two helical nanofibers have absolutely opposite helical senses, but have identical cycle number, coil diameter, coil length, coil pitch, fiber diameter, and fiber cross section.
本文对弧面分度凸轮机构进行了研究，根据凸轮旋向、转向、头数的不同，推导了各种类型的弧面分度凸轮的通用方程；
The roller gear cam mechanism is studied and the surface equations of various types of roller gear cam are acquired.
基于手性液晶的布拉格反射特性，设计了旋向相反的手性液晶所构成的红、绿、蓝三基色叠层级联结构，以达到增强单元反射率的目的。
Based on the Brag reflection of cholesteric liquid crystal, we designed a structure formed by opposite charities of cholesteric liquid crystal of red, green and blue to enhance the reflectivity.
杰克将矛向一只狼啪地挥去，然后旋过身来。
这架代号为GEN H - 4的直升机有两个向相反方向旋转的旋翼，最高飞行速度可达每小时50公里。
The helicopter, named GEN H-4, has a set of two rotors turning in opposite directions and can fly at a maximum speed of 50 kilometres (31 miles) per hour.
Menkhib和加州星云大约距离地球1800光年，并在对银河系的地球银河系猎户座旋臂位于同一方向。
Menkhib and the California Nebula are about 1, 800 light-years away from Earth and are located within the same spur of the Orion spiral arm of the Milky Way galaxy as Earth.
Menkhib和加州星云大约距离地球1800光年，并在对银河系的地球银河系猎户座旋臂位于同一方向。
Menkhib and the California Nebula are about 1,800 light-years away from Earth and are located within the same spur of the Orion spiral arm of the Milky way galaxy as Earth.
使用开表器时，可先将后盖向旋紧的方向稍微拧一下，再向旋松的方向拧。
Use a meter, the first cover to tighten slightly in the direction of twist, to loosen the direction of twist.
机翼承受垂向弯曲、弦向弯曲和扭转变形，螺旋桨旋翼的桨叶认为是刚性的并承受一阶挥舞和摆振。
The wing withstands vertical bending, chordwise bending and torsional deformations, and the rotor blade is considered to be capable of rigidly withstanding one order flap and lag motions.
试验表明其出口平均总压恢复系数较低，周向总压畸变指数较大，旋流较强且很不规则。
Test results show lower exit average total pressure recovery, larger circumferential total pressure distortion and stronger and more irregular secondary flow.
实验表明：这类等离子体反应器中，旋流切向速度分量和轴向速度分量径向分布划分成近轴、过渡和近壁区。
The experimental results show that the tangential velocity and axial velocity components of the swirl flow along radial were divided into the near-axis, the transition and the near-wall zones.
提出对前向飞行的水平旋翼的振动进行补偿，可以大幅度提高合成距离像的质量。
And it is proposed that much improvement of the range profiles can be achieved by using the vibration compensation of the main rotor of the helicopter in forward flight.
结论：前臂完全旋后时，桡骨向远侧、背侧移位，尺骨头靠在尺骨切迹的掌侧面。
Conclusion: While the forearm in complete supination, the radius shifts to the dorsal and distal side, and the capitulum ulnae is at the volar side of the notch ulnae.
土木香大型粗糙的植物(土木香旋覆花属)，原产于中亚，花黄色，头状花序呈辐射状向四周延伸，根入药。
A tall, coarse plant (Inula helenium) native to central Asia, having rayed yellow flower heads. The roots are used medicinally.
针轮由小及大逐渐向浆液传递动量，启动旋流，产生离心过滤压力。
The bristle assemblies give serous fluid momentum step by step to form a rotary flow and to yield filtration pressure.
大约5亿年前，落向中心的气体洪流在缺乏旋臂的星盘中点燃了恒星诞生的风暴；
The tsunami of gas racing toward the center has fueled rapid star birth for at least the past 500 million years in the relatively armless disk.
一般的讲，直升机向旋翼倾斜的方向移动。
Generally speaking, the helicopter will move in the direction it's tilted.
一般的讲，直升机向旋翼倾斜的方向移动。
Generally speaking, the helicopter will move in the direction it's tilted.
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