she got 90 marks out of 100 for geography 这个out

1. 从内部
from the inside of
· She went out of the room,taking the flowers with her.
她拿着花走出了房间.

2. 离开；出
away from
· My place is six miles out of town.
我的住地距城六哩.

3.从中
from among
· You must choose out of these.
你必须从这中间选择.

4.
在…范围之外
beyond the range of
· Get out of the way.
别挡道.

5.用…作材料
by the use of
· What did you make it out of?
你是用什么做的那件东西的?
6. 因为
because of
· He asked out of curiosity.
他因好奇而发问.
7. 无
without
· Fish cannot live out of water.
鱼离开水就不能活.
· She was out of her wits.
她神经错乱了.
此处即为第三个意思,从中,可以理解为占比例 如three out of four 就是四分之三