west longitude

基本解释

You are between 40 and 41 degrees north latitude and between 59 and 60 degrees west longitude.
你在北緯40-41度之間，西經59-60度之間。
The distance to Io was 2.5 million kilometers (1.5 million miles) and the image is centered at 85 degrees west longitude.
儅時距木衛一250萬千米，圖像中心對準的是西經85度。
www.astronomy.com.cn
I showed him if you trace down the 120-degree west line of longitude — which runs almost directly through Reno, Nev. — you end up in the Pacific Ocean, somewhere west of Los Angeles.
我指給他看，如果沿著120度西經，會直接經過內華達西麪的，在太平洋的邊上就是洛杉磯。

So each hour's time difference between the ship and the starting point marks a ship's progress of fifteen degrees of longitude to the east or west.