The Niagara Falls are on the border.

尼亚加拉瀑布位于边界上。

We found the border line on the map.

我们在地图上找到了那条边境线。

We stood on the border line and saw the scenery of both countries.

我们站在边境线上，能看到两国的风景。

The red line on the map denoted the border between the two countries.

地图上的红线表示两国的边界。

Did you know that Niagara Falls is located on the border between the USA and Canada?

你知道尼亚加拉大瀑布位于美国和加拿大的边界吗？

Victoria Falls on the border of Zambia and Zimbabwe.

维多利亚瀑布位于赞比亚和津巴布韦的边境。

Strasbourg is on the border of France and Germany.

斯特拉斯堡位于法国和德国的边境。

On the border of dying out

在绝迹的边缘=

They were on the border looking in.

他们毕竟在边境上探视过

They were just on the border looking in.

他们只不过在边缘上探视