limit 
英 [ˈlɪmɪt]  美 [ˈlɪmɪt] 
n. 限制；限量，限度；界线

v. 限制；限定

例句：
He outlined the limits of British power. 

他界定了英国势力的界限。

There is no limit to how much fruit you can eat. 

你吃多少水果没有限制。

Firefighters are being stretched to the limit as fire sweeps through the drought-stricken state. 

火势在这个遭受旱灾的州里迅速蔓延，消防队员疲于应对，接近极限。

Her love for him was being tested to its limits. 

她对他的爱经受着极其严峻的考验。