施加平衡力以抵消这个力。

Apply the equilibrant to counteract the force.

没有平衡力，结构会倒塌。

Without an equilibrant, the structure would collapse.

工程师计算了平衡力以确保安全。

Engineers calculated the equilibrant to ensure safety.

平衡力是保持系统稳定所必需的。

The equilibrant is necessary to keep the system stable.

平衡力的大小必须相等但方向相反。

The equilibrant must be equal in magnitude but opposite in direction.

而平衡力则是作用在同一物体上。

The balance force is on the same object.

配重；平衡力

A counteracting weight or force

增强身体灵活性，加强平衡力和协调力。

Increases the flexibility of the body, enhances balance and coordination.

对于平衡力而言，一个力做正功，另一个力必定做负功；

For balance force, a force to do work, and the other must do;

在已知力系上加上或减去任意一个平衡力系，并不改变原力系对刚体的作用。

The action of a given force system on a rigid body remains unchanged if another balanced force system is added to or subtracted from the original system.