dynamo

発電機、ダイナモ

回転させることで電気を作る機械。

やさしい英語で： A machine that makes electricity when something turns it.

• The bicycle has a small dynamo.
• The dynamo powers the front light as the wheel turns.
• Older cars used dynamos to charge their batteries.

類義語： generator

よく使う表現： bicycle dynamo, dynamo power, dynamo output

精力的な人、活動家

活力にあふれ、多くの仕事をこなす人。

やさしい英語で： Someone who has lots of energy and gets a great deal done.

• My sister is a real dynamo.
• Our new manager is a dynamo who keeps everyone moving.
• Those two volunteers are dynamos, organizing events every weekend.

類義語： powerhouse, live wire

よく使う表現： a real dynamo, an absolute dynamo, a little dynamo

ダイナモ機構

惑星や恒星の内部で、物質の動きが磁場を生み出す仕組み。

やさしい英語で： A process inside a planet or star that creates a magnetic field through moving material.

• Earth's dynamo creates its magnetic field.
• Moving liquid iron drives the dynamo inside the planet.
• Scientists studied how stellar dynamos change over time.

よく使う表現： planetary dynamo, solar dynamo, dynamo action