The teacher asked us to buy a pair of compasses.老师要求我们买圆规.Chinese compasses always point south!中国的罗盘总是指向南方!With straightedge and compasses, divide a segment of a into 2 parts.用直尺和圆规把线段a分成两部分....
山顶上升气流强度随速矢端迹曲率加大而稍有加强.Peak updraft strength is slightly enhanced with hodograph curvature.浑圆度取决于边角的锐度或曲率半径.Roundness depends on the sharpness or radius of curvature of the edges.胶片的曲率是和弯月透镜后面的反射镜同心的.The curvature of the...