rotation

名词 n.
中文释义
美 /ɹoʊˈteɪʃən/

英文释义

名词 n.
  1. The act of turning around a centre or an axis. uncountable
    — An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.
  2. A single complete cycle around a centre or an axis. countable,uncountable
    — Earth's moon completes a rotation every twenty-seven days or so.
  3. A regular variation in a sequence, such as to even out wear, or people taking turns in a task; a duty roster. countable,uncountable
    — Applying crop rotation to a field avoids depleting soil nutrients the way repeated use of a single crop might do.
  4. Тhe movement of investments between different sectors of an economy, or styles of investing, based on anticipated changes in the economic or market cycle. countable,uncountable
    — Sector rotation attempts to capitalize on the tendency of certain sectors to outperform others during specific economic phases, while style rotation involves shifting investments between different investment styles, such as moving from growth stocks to value stocks.
  5. An operation on a metric space that is a continuous isometry and fixes at least one point. countable,uncountable
    — The function mapping (x,y) to (−y,x) is a rotation.
  6. The set of starting pitchers of a team. countable,uncountable
  7. The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll. (see also: V2) countable,uncountable
  8. Repeated play of songs on a radio station, advertisements on a television channel, etc. countable,uncountable
    — The new single enjoyed heavy rotation on MTV.

词形变化

rotations plural

词汇关系

近义词
turning revolution rota roster duty roster schedule turn turn and turn about cycling
上位词
isometry transformation
衍生词
antirotation autorotation axis of rotation birotation Borggreve rotation circumrotation clinorotation contrarotation corotation counterrotation crop rotation cyclorotation derotation dextrorotation double rotation egorotation electrorotation endorotation Euler's rotation theorem exorotation Faraday rotation gyrorotation improper rotation isorotation job rotation levorotation lunar rotation magnetorotation malrotation microrotation misrotation mutarotation nonrotation Norfolk crop rotation Norfolk rotation optical rotation overrotation prerotation pseudorotation race rotation rotamer rotation curve rotation government rotation period rotationplasty rotation-powered pulsar rotation time roton sidereal rotation period specific rotation superrotation superrotational Terrell rotation underrotation Van Nes rotation Wick rotation
相关词
rotary rotate rotational axis

词源

Borrowed from Latin rotātiō. By surface analysis, rotate + -ion.
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