seventh crusade第七次十字军东征
Major seventh大七度
Seventh Floor七楼
Seventh Rebirth第七重生;第七轮回
Seventh Anniversary第七次纪念
Seventh Star第七颗星;表演者;唱片名
July seventh七月七日
seventh pants七分裤
Seventh Chords七和弦
ORD（序数词） The seventh item in a series is the one that you count as number seven. 第7; 第七
I was the seventh child in the family.
我是家里的第7个孩子。
FRACTION（分数词） A seventh is one of seven equal parts of something. 1/7
A million people died, a seventh of the population.
100万人，即人口的1/7，死了。