balance 
英 [ˈbæləns]  美 [ˈbæləns] 
n. 天平；平衡；协调；余额；剩余

v. 使…保持平衡；结算；权衡，比较；均等；被补偿，被抵消

例句：
She was holding onto the rail to keep her balance. 

她手抓着栏杆保持平衡。

He lost his balance as his foot slipped on the ice. 

他脚在冰上打滑，失去了平衡。

He swung around, almost losing his balance. 

他一转身，差点失去平衡。

A gust of wind knocked him off balance. 

一阵狂风吹得他失去了平衡。

There was no other way to ensure that people would get the right balance of foods. 

没有什么别的方法来保证人们饮食合理均衡。

Today, the balance of forces has clearly shifted. 

现在，力量均势的格局显然发生了改变。