They've gone to live up north.

他们已经搬到北方去住了。

They've moved up north.

他们已搬到北部去了。

Apparently there's a very hush-hush project under way up north.

貌似这里往北的地方有个非常机密的项目正在进行。

He was living up North.

他当时正住在北方。

I was amazed that virtually all the things I took for granted up north just didn't happen in Savannah.

令我感到惊讶的是，我在北方视为理所当然的一切事物，在南美大草原上几乎都没有发生。