I live on the ninth floor.(我住在九樓。)

The Lithuanian Philharmonic Orchestra played Beethoven's Ninth Symphony.(立陶宛愛樂交響樂團演奏了貝多芬的《第九交響曲》。)

Today we'll learn the ninth lesson.(今天我們學第九課。)

I wasn't looking forward to entering the ninth grade.(我并不期待進入九年級。)

This dream came true for me one afternoon in the ninth grade.(九年級的一個下午，我實現了這個夢想。)

The dollar rose by a ninth of a cent.(美元升值了1/9美分。)

Junior high was always a difficult time for me, and the move made my ninth grade year even harder.(對我來說，初中一直是一段艱難的日子，而那次搬家讓我的九年級生活更加艱難了。)

I sit in the ninth row.(我坐在第九排。)

Yesterday was the ninth day of the World Cup.(昨天是世界杯的第九天。)

Our office is on the ninth floor.(我們辦公室在的第九層。)