roll back

元に戻す

変更を取り消し、以前の状態に戻すこと。

やさしい英語で： To change something back to how it was before.

• We need to roll back the update.
• The store rolled back its prices.
• Can you roll the settings back to yesterday’s values?

使い方： roll something back to something (We rolled the system back to its earlier version.)

類義語： reverse, undo, revert

よく使う表現： roll back changes, roll back prices

延期する

予定されていたことを、もっと後に行うようにすること。

やさしい英語で： To arrange for something to happen later than planned.

• They may roll back the launch.
• Bad weather forced officials to roll back the event.
• Will they roll the date back again?

使い方： roll something back (They rolled the launch back by two days.)

類義語： postpone, delay, put off

反対語： advance

よく使う表現： roll back something, roll back launch

後退する、撤退する

特に戦闘中、いる場所や陣地から後ろへ退くこと。

やさしい英語で： To move back from a place or position, especially during a fight.

• The troops began to roll back.
• Enemy forces rolled back after the attack.
• The army rolled back toward the river.

類義語： retreat, withdraw, fall back

反対語： advance

よく使う表現： troops roll back, roll back north

意図せず推力が低下する

航空機のエンジンが、操縦士の指示なしに出力を落とすこと。

やさしい英語で： If an aircraft engine does this, its power drops without the pilot asking for it.

• Both engines began to roll back.
• One engine rolled back during the climb.
• Why did the engine roll back without warning?

よく使う表現： engines roll back, roll back unexpectedly