in gear

with a gear engaged

齒輪連上，已嚙合

the captain revved the engines and put them in gear.

機長加快發動機轉速，使其進入工作狀態。

I've got to get my act in gear.

我得采取行動了。

move up a gear

change to a higher gear

換擋提速

out of gear

with no gear engaged

齒輪脫開，不嚙合

she took the engine out of gear.

她將引擎停下。

sometimes his brain seems to slip out of gear.

有時候，他的腦袋好像不聽使喚了。

gear down (或 up)

change to a lower (or higher) gear

換低速（或高速）擋

gear someone for

make ready or prepared

使（某人）做好準備

a nation geared for war.

全國已經進入備戰狀態。

gear something to/towards

adjust or adapt something to make it suitable for (someone or something)

（為適應某人或某事）對（某物）進行調整（或改造）

gear someone/thing up

equip someone or something for a particular purpose

（為特定目的）裝備（某人，某物）

a city not &B{geared up to} an outdoor lifestyle.

一個還沒有為戶外生活方式做好準備的城市。

gear up

To get ready for a coming action or event

為…準備好：為一將要發生的行動或事件做好準備

a group of investors who had geared up for the takeover fight.

已經為兼并做好準備的一群投資人