rotation
/rəʊˈteɪʃən/noun
mass noun
1- the action of rotating about an axis or centre旋转, 转动：
the moon moves in the same direction as the earth's rotation
月球与地球旋转的方向一致
count noun several solar rotations.绕太阳转几圈。
1.1
- the passing of a privilege or responsibility from one member of a group to another in a regularly recurring succession轮流, 轮换：
it has become common for senior academics to act as heads of department in rotation.
高级学者轮流担任系领导已成惯例。
1.2
- （亦作crop rotation）the action or system of rotating crops轮作, 换茬。
1.3
- Forestry the cycle of planting, felling, and replanting【林】轮伐期（指栽种、砍伐和重新栽种的周期）。
1.4
- count noun US a tour of duty, especially by a medical practitioner in training〈美〉（尤指实习医生的）轮流实习。
1.5
- Mathematics the conceptual operation of turning a system about an axis【数】坐标轴的旋转。
1.6
- Mathematics another term for CURL (in sense 2).【数】同CURL（义项2）。
派生词
rotational
adjectiverotationally
adverb词源
mid 16th cent.: from Latin rotatio（n-）, from the verb rotare （see ROTATE）.