| 单词 | rotation |
| 释义 | rotation (once / 1128 pages) 1n 2n When something turns like a wheel, over and over again, it's in rotation. You can't feel the earth's rotation even though you know it's happening. Even if you find the rotation of clothes in the dryer comforting, it's best to remain on the outside looking in. Rotation can also mean a series that repeats. A baseball team has a "pitching rotation" (five pitchers who take turns starting games), while a song that's on the radio every fifteen minutes is on "heavy rotation." WORD FAMILYrotation: rotational, rotations+/rotate: rotatable, rotated, rotates, rotating, rotation, rotatory/rotational: rotationally USAGE EXAMPLESThe second was added to compensate for a slowdown in the earth's rotation and helps to co-ordinate time-keeping among nations that use GMT. BBC(Jan 02, 2017) That is why it helps to include peas or beans in crop rotation. BBC(Jan 01, 2017) The season runs from May through October with a main attraction being daily street bullfights hosted through a rotation of sponsoring villages. Washington Post(Dec 29, 2016) 1 1n the act of rotating as if on an axis the rotation of the dancer kept time with the music Syn|Hypo|Hyper rotary motion circumvolution the act of turning or winding or folding around a central axis feather, featheringturning an oar parallel to the water between pulls gyration, whirlingthe act of rotating in a circle or spiral pivotthe act of turning on (or as if on) a pivot pronationrotation of the hands and forearms so that the palms face downward spin, twirl, twist, twisting, whirlthe act of rotating rapidly spiralflying downward in a helical path with a large radius supinationrotation of the hands and forearms so that the palms face upward turn, twistturning or twisting around (in place) twist, wind, windingthe act of winding or twisting turnout(ballet) the outward rotation of a dancer's leg from the hip twiddlea series of small (usually idle) twists or turns pirouette(ballet) a rapid spin of the body (especially on the toes as in ballet) birling, logrollingrotating a log rapidly in the water (as a competitive sport) motility, motion, move, movement a change of position that does not entail a change of location 2n a single complete turn (axial or orbital) the plane made three rotations before it crashed Syn|Hypo|Hyper gyration, revolution clockwise rotation, dextrorotation rotation to the right counterclockwise rotation, levorotationrotation to the left axial motion, axial rotation, rollrotary motion of an object around its own axis orbital motion, orbital rotationmotion of an object in an orbit around a fixed point spina swift whirling motion (usually of a missile) backspinspin (usually of a moving ball) that retards or reverses the forward motion English, side(sports) the spin given to a ball by striking it on one side or releasing it with a sharp twist topspinforward spin (usually of a moving ball) that is imparted by an upward stroke wallowan indolent or clumsy rolling about turn, turning a movement in a new direction 3n (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin 2Hyper transformation (mathematics) a function that changes the position or direction of the axes of a coordinate system n a planned recurrent sequence (of crops or personnel etc.) crop rotation makes a balanced demand on the fertility of the soil the manager had only four starting pitchers in his rotation Hyper chronological sequence, chronological succession, sequence, succession, successiveness a following of one thing after another in time |
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