railroad junction的用法和样例：
例句
- Shenyang is not only the capital city of Liaoning Province, but the largest city of Northeast China with the largest railroad hub and airport across the region.
沈阳不仅是辽宁省的省会，而且也是东北地区最大的中心城市，有着最大的铁路枢纽和航空港。 - Beslan is an important railway junction, situated on the main line between Rostov-on-Don and Baku, and is the starting point of a branch line to Vladikavkaz.
别斯兰是重要的铁路枢纽，位于顿河畔罗斯托夫到巴库铁路之间，也是通往弗拉季高加索铁路支线的起点。
