| 单词 | jet stream |
| 释义 | jet streamSEE SYNONYMS FOR jet stream ON THESAURUS.COM nounstrong, generally westerly winds concentrated in a relatively narrow and shallow stream in the upper troposphere of the earth. similar strong winds in the atmosphere of another planet: jet streams on Jupiter. the exhaust of a jet or rocket engine. Origin of jet streamFirst recorded in 1945–50 Words nearby jet streamjet-propelled, jet propulsion, jetsam, jet set, Jet Ski, jet stream, jettison, jet-to-let, jetton, jetty, jet wash Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for jet streamjet stream nounmeteorol a narrow belt of high-altitude winds (about 12 000 metres high) moving east at high speeds and having an important effect on frontogenesis the jet of exhaust gases produced by a gas turbine, rocket motor, etc Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for jet streamjet stream A narrow band of swiftly moving air found at very high altitudes. notes for jet streamMovements of the jet stream have important (but generally short-lived) effects on weather patterns. notes for jet streamTravel time in an airplane can be lengthened or shortened by the jet stream, depending on the direction of flight and the strength of the stream. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Scientific definitions for jet streamjet stream A narrow current of strong wind circling the Earth from west to east at altitudes of about 11 to 13 km (7 to 8 mi) above sea level. There are usually four distinct jet streams, two each in the Northern and Southern hemispheres. Jet stream wind speeds average 56 km (34 mi) per hour in the summer and 120 km (74 mi) in the winter. They are caused by significant differences in the temperatures of adjacent air masses. These differences occur where cold, polar air meets warmer, equatorial air, especially in the latitudes of the westerlies. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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