1. She had an apartment on the ninth floor.
    她在九层楼上有一套房子。

2. Billy is fourteen years old and in the ninth grade.
    毕利十四岁，在上九年级。

1. One ninth of the products have defects.
    九分之一的产品有毛病。

1. 第九：姜老先生吃了八块mooncakes,第九(ninth)块正往嘴里塞;土行孙已经吃了十块月饼和十一块馅饼(pie),第十二(twelfth)块馅饼挂在脖子上准备带回家去吃;而邓婵玉是樱桃小口,吃了一块馅饼就摆着双手说不能再(not...any more)吃了;

2. 九度：octave 八度 | ninth 九度 | tenth 十度

3. 第九的：fourth 第四的 | ninth 第九的 | eleventh 第十一的

4. ninth在线翻译

4. 第九;九分之一：ninety 九十,九十个 | ninth 第九;九分之一 | nitrogen 氮

1. 第九
    The ninth item in a series is the one that you count as number nine.

    e.g. ...January the ninth.
           1月9日
    e.g. ...students in the ninth grade.
           9年级学生

2. 九分之一
    A ninth is one of nine equal parts of something.

ninth的意思

    e.g. In Brussels the dollar rose by a ninth of a cent...
           在布鲁塞尔美元升值了1/9美分。
    e.g. What you see is only the tip. Eight ninths of it is under the sea.
           你看到的只是一角，8/9的部分在海里。

1. one part in nine equal parts

    Synonym: one-ninth

2. position nine in a countable series of things

    e.g. going into the ninth they were a run ahead

1. coming next after the eighth and just before the tenth in position

    Synonym: 9th