[ti:US to Drop Old Definition of Foot Measurement][by:shang05.com][00:00.00]更多听力请访问shang05.com[00:00.04]The U.S. government plans to drop a very old way of measuring a foot over large distances.[00:10.52]Land surveyors in the United States currently have two choices[00:15.92]for measuring the 12-inch measurement known as a foot.[00:21.80]Some use what is known as the U.S. survey foot.[00:26.76]Others use a more widely accepted definition of the measurement, known as the international foot.[00:35.80]The international foot measurements are based on the meter.[00:41.00]The U.S. survey foot is a bit longer, about 0.01 foot per mile,[00:48.00]the National Oceanic and Atmospheric Administration, or NOAA, reports on its website.[00:57.40]The difference is so small that it cannot be seen by looking at a traditional 12-inch ruler.[01:05.68]But when measuring large distances, that small amount matters.[01:11.36]It sometimes leads to errors and misunderstandings.[01:17.56]The U.S. government officially accepted the international foot as the nationwide standard in 1959.[01:27.00]But it permitted surveyors to keep the old U.S. survey foot in a decision that was meant to be temporary.[01:36.64]Today, surveyors in 40 American states and territories still use the larger U.S. foot.[01:45.52]But the government says it will officially cancel the survey foot[01:50.08]in 2022 and replace it with the international foot.[01:56.96]NOAA and the National Institute of Standards and Technology announced the change earlier this year.[02:06.24]Michael Dennis is a project manager for NOAA's National Geodetic Survey.[02:13.00]The agency studies geodesy, a science that seeks to measure the size[02:19.76]and shape of the earth and identify exact positions on its surface.[02:27.44]Dennis told The Associated Press that the two standards have caused[02:32.52]"chaos" for surveying and mapping operations.[02:38.60]He said the difference in foot measurements caused problems[02:43.20]during planning for a high-speed rail project in California.[02:48.92]It also created difficulties for a major bridge project linking Oregon, which uses the international foot,[02:57.72]to Washington, which uses the U.S. one, Dennis added.[03:04.40]Dennis also gave an example that he heard about a state airport project.[03:10.64]He said there were misunderstandings between the builders and planners of the project[03:16.76]because they were in two states that used different foot standards.[03:23.20]The problems led to building delays, extra costs[03:27.44]and the redesign of one building to be one floor shorter, Dennis added.[03:35.56]"It's embarrassing that we even had this going on for 60 years," he said.[03:43.64]Still, Dennis admits that some surveyors might find it hard[03:49.44]to accept the international foot after so many years.[03:55.56]The U.S. foot "sounds very patriotic, very American,"[04:01.04]Dennis said in an internet video presentation explaining the change.[04:08.28]However, he said he thinks it makes sense for people in the United States[04:13.92]to be using the same measuring standard as the rest of the world.[04:20.16]I'm Bryan Lynn. 更多听力请访问shang05.com