than 是什么用法?

比 的意思 因为
why do Argentine ants behave differently in California than they do in Argentina?
为什麼阿根廷的蚂蚁在加州的行为比起在阿根廷的是不同
这是than 的用法
1.比,比较
She looks younger than she is.
她看起来比她实际岁数显得要年轻.
He runs a lot faster than I.
他跑得比我快多了.
2.(用于rather,sooner之后)与其...(宁愿...)
I would rather do some reading at home than go shopping with them.
与其和他们去购物,我倒宁愿留在家里读点书.
3.(用于else,other等之后)除了...(之外)
She has never been to a big city other than Chicago.
除芝加哥外她没有去过别的大城市.
4.(用于no sooner,scarcely,hardly之后)当,就
No sooner had we left the village than it began to rain.
我们刚离开村子,天就下起雨来了.
介词 prep.
1.【书】比
She is a teacher than whom no one is more patient.
她是个比谁都耐心的老师.
2.(后接计量数目)超过
My aunt stayed here for more than a week.
我姑妈在这儿呆了一个多星期.