Going towards the west, or leading towards the west. It is a practical, sign-and-timetable word rather than a conversation word: you see it on trains, buses, planes, roads and traffic reports.

Going towards the west, or leading towards the west朝西走、或通往西邊的意思。It它 is a practical, sign-and-timetable word rather than a conversation word是個實用的、標示牌和時刻表上用的字，不是聊天用語：you你 see it on trains, buses, planes, roads and traffic reports會在火車、公車、飛機、道路和路況報導上看到它。

"The westbound train" is the train heading west; "westbound traffic" is the cars going west; "the westbound lanes" are the lanes for cars travelling in that direction. It works both as an adjective before a noun (a westbound flight) and, less often, as an adverb after a verb (the truck was heading westbound).

"The westbound train"「The westbound train」 is the train heading west指的是往西開的火車；"westbound traffic"「westbound traffic」 is the cars going west指的是往西走的車流；"the westbound lanes"「the westbound lanes」 are the lanes for cars travelling in that direction指的是往那個方向走的車道。It它 works both as an adjective before a noun可以當形容詞放在名詞前面 (a westbound flight像 a westbound flight) and而 less often比較少見的是, as an adverb after a verb當副詞放在動詞後面 (the truck was heading westbound像 the truck was heading westbound)。

Two things are worth noticing. First, this word belongs to a whole small family built the same way — *eastbound, northbound, southbound*, and also *inbound* and *outbound* — so once you have one, you have them all.

Two things兩件事 are worth noticing值得注意。First第一，this word這個字 belongs to a whole small family built the same way屬於一整組用同樣方式造出來的字——*eastbound, northbound, southbound*像 eastbound、northbound、southbound，and還有 also *inbound* and *outbound* inbound 和 outbound——so所以 once你只要學會 you have one一個，you你就 have them all全部都會了。

Second, it describes direction of travel, not position: a westbound platform is not a platform in the west, it is the platform where you stand to go west. That difference matters a lot when you are actually standing in a station in a strange city trying not to get on the wrong train.

Second第二，it它 describes direction of travel描述的是行進的方向，not position不是位置：a westbound platform西向月台 is not a platform in the west不是指位在西邊的月台，it it is the platform where you stand to go west是你站上去、要往西邊去的月台。That這個 difference matters a lot差異在你 when you are actually standing in a station in a strange city真的站在一個陌生城市的車站裡 trying not to get on the wrong train想搞清楚別上錯車的時候，非常重要。