旅游开发具有明显的时间过程规律，也有一定的空间层次规律。

Obviously, there are some time-process and space-layer regular patterns in tourism development.

youdao

旅游开发具有明显的时间过程规律，也有一定的空间层次规律。

Obviously, there are some time-process and space-layer regular patterns in tourism development.

youdao