用法:
1 (US) place where baseball is played 棒球场.

用法:
2 (sl 俚) area; range 区域; 范围:
a guess that's just not in the right ballpark, ie one that is wildly inaccurate 不著边际的瞎猜 *
[attrib 作定语] a ballpark figure, ie a rough estimate 约略的数字.

• occasion
• occasional
• occupation
• occupy
• occur
• occurrence
• odd
• odds
• off
• offence
• offend
• offensive
• offer
• office
• old
• omit
• on
• once
• oneself
• only
• open
• opening
• opera
• operate
• operation