ord.第九
n.九分之一
num.第九(的)，九分之一(的)

原形：ninth复数：ninths

His house is the ninth on the right side.
他的房子是右边第九幢。
Eric ran ninth.
埃里克跑步第九名。
His number is the ninth in his class.
他的学号是9号。
The ninth month of the year is September.
一年中的第九个月是九月。
In an octave, the ninth note is called the 'leading tone'." (在一个八度音阶中，第九个音符被称为“导音”。
She scored ninth in the national mathematics competition.
她在全国数学竞赛中获得了第九名。
The ninth chapter of the book discusses quantum physics.
这本书的第九章讨论量子物理。
He celebrated his ninth birthday with a big party at home.
他在家举办了一个盛大的派对来庆祝他的九岁生日。
The ninth inning is often the most exciting in baseball.
在棒球比赛中，第九局常常是最激动人心的。
We are currently working on the ninth version of our software.
我们目前正致力于我们的软件第九版开发。
The ancient Greeks believed that there were nine muses.
古希腊人相信有九位缪斯女神。
In a standard deck of cards, the ninth card in each suit is the nine of hearts/diamonds/clubs/spades.
在一副标准扑克牌中，每种花色的第九张牌分别是红桃/方块/黑桃/梅花的九。
This is the ninth time we've had to reschedule the meeting.
这是我们第九次重新安排这次会议了。