with a gear engaged
齿轮连上，已啮合
the captain revved the engines and put them in gear.
机长加快发动机转速，使其进入工作状态。
I've got to get my act in gear.
我得采取行动了。
change to a higher gear
换挡提速
with no gear engaged
齿轮脱开，不啮合
she took the engine out of gear.
她将引擎停下。
sometimes his brain seems to slip out of gear.
有时候，他的脑袋好像不听使唤了。
change to a lower (or higher) gear
换低速（或高速）挡
make ready or prepared
使（某人）做好准备
a nation geared for war.
全国已经进入备战状态。
adjust or adapt something to make it suitable for (someone or something)
（为适应某人或某事）对（某物）进行调整（或改造）
equip someone or something for a particular purpose
（为特定目的）装备（某人，某物）
a city not &B{geared up to} an outdoor lifestyle.
一个还没有为户外生活方式做好准备的城市。
To get ready for a coming action or event
为…准备好：为一将要发生的行动或事件做好准备
a group of investors who had geared up for the takeover fight.
已经为兼并做好准备的一群投资人