尚待开发的领域的英文怎么说

尚待开发的领域的英文：
frontier area

You are exploring the frontiers in science.
你在探究科学的新领域。

Sweden has frontiers with Norway and Finland.
瑞典与挪威和芬兰接壤。

We were turned back at the frontier.
我们在边界那儿被赶了回来。

The frontier forces had to operate against the invaders.
边防军不得不对入侵敌人作战。

Professor Field is devoted to the exploration of the frontiers of medicine.
菲尔德教授致力于探索医学研究的新领域。

This is a drainage area.
这里是排水区。

The areas of greater rainfall conform roughly with these forested areas.
降雨量较大地区大致与这些森林地区相符合。

The?penalty area?is the rectangular area in front of the goal.
禁区就是指球门前的矩形区域。

Is this the baggage inquiry area?
查询行李情况是在这里吗？

The child birthrate in that area has doubled.
该地区的婴儿出生率已经增加了一倍。