By Hardika Singh
作者：哈迪卡·辛格
The Dow Jones Industrial Average climbed above 40000 for the first time today.
道瓊斯工業平均指數今天首次攀升至4萬美元以上。
It was a long road to 40000. The Dow took almost 103 years to reach 10000 in March 1999. Reaching 20000 required nearly 18 years more. Then 30000 came three years later, in 2020.
通往 40000 是一條漫長的道路。道瓊斯指數花了將近103年才在1999年3月達到1萬點。達到2萬還需要將近18年的時間。然後，三年後，即2020年，3萬美元到來。
The Dow is a price-weighted measure, meaning the bigger the stock price, the larger the sway for a particular component, and vice versa. The first iteration included 12 mostly consumer goods and basic material suppliers like U.S. Leather and Tennessee Coal & Iron.
道瓊斯指數是一種價格加權指標，這意味着股價越大，特定成分的影響力就越大，反之亦然。第一次迭代包括12家以消費品和基本材料爲主的供應商，例如美國皮革和田納西煤鐵公司。
Today it includes 30 stocks. There are some newcomers: Amazon.com recently joined the Dow, succeeding Walgreens Boots Alliance. Technology companies including Microsoft and Intel were added in the 1990s, while companies such as Bethlehem Steel and Woolworth dropped out.
今天，它包括30只股票。還有一些新來者：亞馬遜最近加入了道瓊斯指數，接替了沃爾格林靴子聯盟。包括微軟和英特爾在內的科技公司在20世紀90年代被加入，而伯利恒鋼鐵和伍爾沃斯等公司則退出了。
Stocks have generally risen alongside the Dow, which is up about 6% this year. The S&P 500 is up 11%, while the Nasdaq Composite is up 12%. All three leading indexes finished Wednesday at records.
股市普遍與道瓊斯指數一起上漲，道瓊斯指數今年上漲了約6％。標準普爾500指數上漲11％，而納斯達克綜合指數上漲12％。所有三個主要指數週三收盤時均創歷史新高。