Hicks' sign

例句：

1. 1. The Hicks's sign is a mathematical concept that has been used to describe the relationship between two variables.
   希克斯符号是一个数学概念，用于描述两个变量之间的关系。
2. 2. In physics, the Hicks's sign is used to indicate that a force acts in the direction opposite to the displacement of anobject.
   在物理学中，希克斯符号被用来表示力的作用方向与物体位移方向相反。
3. 3. The Hicks's sign is often used in engineering calculations to account for the effects of friction and airresistance on the movement of objects.
   希克斯符号常用于工程计算中，以考虑摩擦力和空气阻力对物体运动的影响。