Leagues are commonly made for mutual defense.

结成联盟往往是为了共同防御。

In 1952, there were 43 minor leagues and 324 teams nationwide.

1952年，全国共有职业棒球次级联盟43个，棒球队324个。

Chandler was instrumental in making Jackie Robinson the first black player in the major leagues.

钱德勒帮助杰基·鲁宾逊成为职业总会中第一个黑人球员。

I knew what I could do in the minor leagues, I just wanted a chance to prove myself in the majors.

我知道我能在小联合会中做些什么，我只是想要一个在大型职业总会中证明自己的机会。

Twenty Thousand Leagues is probably his most prescient work, anticipating submarine warfare, scuba diving, and even the taser.

《海底两万里》可能是他最具预见性的作品，其中预见了潜艇战、水肺潜水甚至泰瑟枪。