Please avoid unnecessary expenses until the new budget is approved next month.

在新預算下個月核准之前,請避免不必要的開支。

The manager said a second meeting was unnecessary since everyone agreed by email.

經理說既然大家已透過電子郵件達成共識,就不必再開第二次會議。

To save time at the airport, leave unnecessary items out of your carry-on bag.

為了在機場節省時間,請把不必要的物品從隨身行李中拿出來。