Instead of having to think about heavenly bodies moving through space, or changing their places, the Greeks could simply think in terms of fixed spheres rotating gracefully on their axes.
希腊人仅把它们认作众星球是在它们固定的轨道做着优雅的周而复始的旋转，却不认为天体穿梭于星空有变化的运动着。
The inherent anisotropy of sands was investigated firstly through the shear tests with fixed principal stress axes.
通过应力主轴固定单调剪切试验分析了所制作砂样的初始各向异性特性。
Via reading system variables fixed point of axes can be determined in machine coordinates system: Via reading system variables PLC state bit is condition of criterion as NC macro-program goto;
通过读取系统变量可以灵活地确定每一个轴在机床坐标系中的固定点；通过读取系统变量将PLC状态位作为NC宏程序跳转的判断条件；
The additional light-emitting diodes are fixed to the light body in such a way that the optical axes thereof form a concentric light spot in the form of a ring around the main light spot.
多个附加发光二极管固定在照明本体上，以这样的方式它们的光轴形成一个环绕主照明区的同心环形照明区。
The main light-emitting diodes are fixed to the light body in such a way that the optical axes thereof cross the light axis in the center of a light spot.
多个主发光二极管固定在照明本体上，以这样的方式它们的光轴与光轴在照明区的中心交叉。
The utility model is characterized in that: the transverse sections of shaped sections to be severed determine that the edged cutting tools are fixed on the rotation axes and rotate along.
其主要特点是：由被切型材横截面决定其切削刃形状的刀具被安装在转动轴上，随转动轴转动。
The utility model is characterized in that: the transverse sections of shaped sections to be severed determine that the edged cutting tools are fixed on the rotation axes and rotate along.
其主要特点是：由被切型材横截面决定其切削刃形状的刀具被安装在转动轴上，随转动轴转动。
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