单词 | troposphere |
释义 | troposphere (once / 176408 pages) n Use the noun troposphere when you're talking about the part of the atmosphere that's closest to the surface of the Earth. The gases around our planet, which are affected by the Earth's gravity, make up the atmosphere. It is divided into three sections, the lowest of which is the troposphere. Our planet's weather is largely caused by whatever happens in the troposphere, which is known by scientists for its turbulent movement. The word troposphere comes from the Greek root tropos, "a turn or change." WORD FAMILYtroposphere USAGE EXAMPLESThe QBO is thought to be driven by tropical waves—generated by warm, circulating air—that propagate up from the troposphere into the stratosphere. Science Magazine(Sep 08, 2016) At 29,028 feet up in the troposphere, so little oxygen was reaching my brain that my mental capacity was that of a slow child. Jon Krakauer, Into Thin Air(1996) Conversely, low HOM concentrations far below 2 × 106 cm−3 are expected far from sources of terpenes, especially over oceans and the upper free troposphere. Nature(May 24, 2016) n the lowest atmospheric layer; from 4 to 11 miles high (depending on latitude) Hyper layer a relatively thin sheetlike expanse or region lying over or under another |
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