Many of the best baseball players in the United States played in the Negro Leagues before white professional teams began accepting black players.

VOA: special.2009.04.05

We divide that by the mass, so 0.12 kilograms, that's the mass of a regulation baseball for the major leagues, and the velocity of the baseball is 42 meters per second. So, we can cross out our units doing our unit analysis.

我们用质量来除它，质量为0，12千克，这是大多数联赛规定的棒球质量,棒球的速度为42米每秒,所以，我们可以消去单位,来做单位分析。

麻省理工公开课 - 化学原理课程节选

just to be out like, leagues ahead of everybody else in terms of like brain ability.

就聪明才智来讲，任何人都无法和他相比。

知道约翰·纳什吗？ - SpeakingMax英语口语达人

All these sports are American inventions and have developed wide support in schools,amateur and professional leagues.

VOA: special.2010.06.02

Yale is wonderful. It's a smaller school than a lot of the Ivy Leagues.

耶鲁大学是一所非常棒的学校。与其他常春藤联盟的学校相比，耶鲁的规模要小一些。

耶鲁文艺刊主编 - SpeakingMax英语口语达人

Some observers said that Jackie Robinson was not the best player in the Negro Leagues.

VOA: special.2009.04.05

You know, there's like different rankings of leagues you can play in.

你可以在不同等级的联队里打球。

会打棒球吗？ - SpeakingMax英语口语达人

Unlike Major League Baseball,salaries in the National Basketball Association and some other leagues are capped.

VOA: special.2010.07.26

Every year,the best players from the National and American leagues compete in an All-Star game.

VOA: special.2010.04.11

Two of its major teams are the current champions of their leagues.

VOA: special.2009.07.13

Soon after that, other sports leagues accepted the idea of free agency.

VOA: special.2010.07.26

Blacks,however, were not permitted to play in the major leagues.

VOA: special.2009.04.05

White Democrats there began organizing groups called White Leagues.

VOA: special.2010.03.04

Millions of players are registered with leagues and clubs.

VOA: special.2010.06.09

He says different leagues have different styles of play.

VOA: special.2010.06.02

In all,nineteen play in foreign professional leagues.

VOA: special.2010.06.09

Elsewhere in the Major Leagues, Chicago White Sox left-handed pitcher Mark Buehrle threw the 18th perfect game in Major League history against the Tampa Bay Rays on July 23.

VOA: standard.2009.12.24