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| VERB |
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| /ˈdʌbl/ |
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| 1 | I to become twice as big , twice as much , or twice as many 增加一倍；成为两倍 |
| The number of people without work has doubled in the last five years. 失业人数在过去的5年里已经增长了一倍。 |
| double in size/amount/price etc Their house has doubled in value since they bought it. 他们的房子自从买下以来已增值一倍。 |
| | 1a | T to increase something so that it is twice as big , twice as much , or twice as many 使加倍；把…增加一倍 | | The government is threatening to double the tax on alcohol. 政府威胁要把酒税提高一倍。 | |
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| 2 | double T to fold something so that it has two layers of equal size 折叠；把…对折 |
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| 3 | I in baseball , to hit the ball far enough so that you can run to the second base （棒球中）击出二垒打 |
| PHRASAL VERBS |
| - | ˈdouble as or ˌdouble ˈup as |
| PHRASAL VB |
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| | double (up) as sth: to have another use or job as something 兼作；兼任 | In the corner was an old sofa that doubled as Simon’ s bed. 角落里有张旧沙发，兼作西蒙的床用。 | |
| - | ˌdouble ˈback |
| PHRASAL VB |
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| | to turn and go back in the direction that you have come from 沿原路折回 | We doubled back through the fields to the village. 我们沿原路穿过田野返回村子。 | | double back on yourself When you get to the roundabout, you need to double back on yourself. 到达环形交叉路口时你要循原路折回。 | |
| - | ˌdouble ˈover |
| PHRASAL VB |
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| 1 | T double22 | The map on his desk was doubled over so I couldn’ t see it. 他桌上的地图对折起来了，所以我看不见。 | |
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| 2 | I/T often passive to bend forwards because you are in pain or because you are laughing a lot （因疼痛或大笑而）弯着身子 | be doubled over with sth She was doubled over with pain. 她痛得弯下了腰。 | |
| - | ˌdouble ˈup |
| PHRASAL VB |
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| | if two people double up , they share something , especially a bedroom 共用，合用（尤指卧室） | The children won’ t mind doubling up. 这些孩子不会介意两人共住一室的。 | |
| - | ˌdouble ˈup as |
| PHRASAL VB |
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| | double as |
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