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N-COUNT
齒輪；傳動裝置；變速器
The gears on a machine or vehicle are a device for changing the rate at which energy is changed into motion.
例句
On hills, he must use low gears...
在山上,他必須掛低速擋。
The car was in fourth gear...
車掛的是四擋。
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N-UNCOUNT
（某一特定活動的）設備，服裝
The gear involved in a particular activity is the equipment or special clothing that you use.
例句
About 100 officers in riot gear were needed to break up the fight.
大約需要100名穿防暴服的警察前來制止這場斗毆。
...fishing gear...
釣具
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N-UNCOUNT
服裝
Gear means clothing.
例句
I used to wear trendy gear but it just looked ridiculous.
我以前常穿新潮的衣服，但看上去卻滑稽可笑。
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N-UNCOUNT
毒品；（尤指）海洛因
Some people refer to illegal drugs, especially heroin, as gear .
例句
Are these people using gear and amphetamines at the same time?
這些人同時服用海洛因和安非他明嗎？
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V-PASSIVE
使為…而準備；使為了達到…而作好準備
If someone or something is geared to or towards a particular purpose, they are organized or designed in order to achieve that purpose.
例句
Colleges are not always geared to the needs of mature students...
大學有時滿足不了成人學生的需求。
My training was geared towards winning gold in Munich.
我為了在慕尼黑奪取金牌而進行訓練。