1·Run the tangents.
跑切线的路线。
2·Life is a circle, some people did not take a lifetime to draw out the fate of the circle, in fact, each point on the circle has a soaring tangents.
人生是个圆，有的人走了一辈子也没有走出命运画出的圆圈，其实，圆上的每一个点都有一条腾飞的切线。
3·If a vehicle travels at high speed on a carefully restricted path made up of tangents connected by sharp circular curves, riding is extremely uncomfortable.
如果车辆驾驶员在高速路限小心切线由尖圆形连接曲线骑术极不舒服。