key position的用法和樣例：
例句
- The beautiful plain of Imphal was the key to such a supply corridor, a gateway among the mountain passes.
英帕爾的美麗平原，正是這樣一條供應走廊的樞紐，是山區各條要隘的大門(mén)。 - Its position at the heart of Europe has meant that Austria has always been a junction for communications between the continent's main economic and cultural centres.
奧地利處于歐洲心臟的地位意味著(zhù)它歷來(lái)是該大陸各大經(jīng)濟中心和文化中心的聯(lián)絡(luò )樞紐。
