numeral [序数词] 第九；第九名；九度音
The Lithuanian Philharmonic Orchestra played Beethoven's Ninth Symphony. 立陶宛爱乐交响乐团演奏了贝多芬的《第九交响曲》。
noun [抽象名词] 九分之一
She'd go to the library during ninth period, when she had study hall. 第九节课是自习时间，她会去图书馆学习。
adjective [原级] 第九的；九分之一的
This is Hunt's ninth book. 本书是亨特的第九本著作。
- ninth 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 37 The process of ageing
