There are nine subjects

九───nine;门学科───A subject

Six from fifteen leaves nine.───15减6等于9.

When I was nine or ten someone explained to me that when you are grown up you have to work.───我大概9岁或10岁的时候，有人跟我说人长大了就得工作。

Young people, full of vigour and vitality, are like the sun at eight or nine in the morning.───青年人朝气蓬勃, 好像早晨八九点钟的太阳.

Four of the nine starting balloons were still aloft the next day.───9个开幕气球第二天还有4个飘在空中。

Three times three is nine.───三三得九.

I got here just after nine.───我到达这里时刚过九点。

I've been with my girl for nine years.───我同我女朋友交往9年了。

We still sighted nine yachts.───我们还是看到了九艘游艇。

A cat has nine lives.

Three times by three makes nine.

There were nine pounds left, besides some pennies.

Parsley seed goes nine times to the Devil.

There are nine planets in the solar system.