rotation

回転

物が固定された点や軸の周りを回る動き。

やさしい英語で： The movement of something turning around a fixed point or line.

• The wheel’s rotation slowed down.
• Earth’s rotation gives us day and night.
• The motor controls the speed of rotation.

類義語： turning, spinning

よく使う表現： earth rotation, speed of rotation, rotation around something

交代、輪作

決まった順序で、担当者や使うものを定期的に替えること。

やさしい英語で： A regular change in who does a job or what is used, following a set order.

• We share kitchen duties in rotation.
• Crop rotation helps keep the soil healthy.
• The manager changed the staff rotation this month.

類義語： alternation

よく使う表現： crop rotation, staff rotation, in rotation

一回転

固定された点や軸の周りを一周し、元の位置に戻ること。

やさしい英語で： One complete turn around a fixed point or line, ending where it started.

• The wheel made one rotation.
• Each rotation takes five seconds.
• How many rotations does the blade make per minute?

類義語： revolution, turn

よく使う表現： one rotation, full rotation, complete rotation

ヘビーローテーション、繰り返し放送

ラジオやテレビで、曲や広告を繰り返し流すこと。

やさしい英語で： The repeated playing of songs or advertisements on radio or television.

• The song is in heavy rotation.
• The station added her single to its rotation.
• Several advertisements run in regular rotation each evening.

類義語： airplay

よく使う表現： heavy rotation, regular rotation, in rotation