界内球的英文：
fair ball
- he reached into his inside jacket pocket; inside out; an inside pitch is between home plate and the batter.
他把手伸向衣服的内口袋；里面翻到外面；界内球是在本垒和击球手之间的球。
adj. 公正的；公平的；合理的；白皙的；晴朗的；美丽的
adv. 公平地，公正地；正面地，直接地；清楚地
n. 美人；美好的事物；集市；交易会，展览会；博览会
v. 转晴
- They are going to the fair.
他们正在到集市上去。 - Welcome you to the fair.
欢迎您到交易会来。 - His knowledge of English is fair.
他的英语水平尚可。 - hold a fair to raise money
举办义卖会筹款 - The elections were free and fair.
选举是自由公正的。
n. 球；舞会
v. 成团块；捏成球形
- You have no balls!
你们一点胆量都没！ - The kitten tangled the ball of yarn.
猫把线团儿弄乱了。 - A ball hissed by.
子弹嘶地一声飞过。 - The dog had itself a ball.
狗玩得很愉快。 - Do you have the balls to challenge authority?
你有挑战权威的胆量么？