phase

段階、時期

物事の進行や発達における一つの段階や時期。

やさしい英語で： One part of a process or period of development.

• The project has three phases.
• We are entering the final phase of training.
• Their daughter is going through a difficult phase.

使い方： phase of something (The first phase of construction is complete.)

類義語： stage, period

よく使う表現： first phase, final phase, phase of development, early phase

位相

繰り返す動きや変化の中の位置で、他の周期との時間的なずれを示すもの。

やさしい英語で： The position in a repeating movement or change that shows whether things happen together.

• The waves are in phase.
• The two signals are out of phase.
• A small phase difference changes the combined sound.

使い方： in phase with something (The two signals are in phase with each other.); out of phase with something (One wave is out of phase with the other.)

よく使う表現： in phase, out of phase, phase difference

側面、面

話題や問題の、他と分けて考えられる一つの面。

やさしい英語で： One side of a subject or problem that can be considered separately.

• We discussed another phase of the problem.
• He studied every phase of the subject.
• The social phase of the issue received little attention.

使い方： phase of something (Her book examines every phase of the question.)

類義語： aspect, side, facet

よく使う表現： another phase, every phase, phase of something

段階的に導入する、段階的に廃止する

時間をかけて、少しずつ導入したり使用をやめたりすること。

やさしい英語で： To introduce or stop using something gradually over a period of time.

• We plan to phase out plastic bags.
• The factory phased in safer equipment.
• These older models are being phased out this year.

使い方： phase something in (The company will phase in the new software.); phase something out (The city plans to phase out diesel buses.)

よく使う表現： phase something in, phase something out, phase out something

段階的に導入する

一度にではなく、少しずつ新しいものを取り入れること。

やさしい英語で： To introduce something gradually, a little at a time.

• We will phase in the changes.
• The school phased in its new rules last year.
• They are phasing the equipment in one department at a time.

使い方： phase something in (We will phase the new system in over six months.)

類義語： introduce gradually

よく使う表現： phase in something, phase something in