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| VERB |
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| /ˈtaɪtn/ |
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| 1 | T to turn something such as a screw or lid until it is tight and you cannot turn it any more 旋紧；拧紧；上紧 |
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| 2 | T to pull something such as a rope or belt until it is straighter or fits more tightly around something 使绷紧；拉紧 |
| | 2a | I if something such as a rope or chain tightens, it becomes straighter or fits more tightly around something 变紧；绷紧 | |
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| 3 | I/T if a muscle or a part of your body tightens, or you tighten it , it becomes hard and stiff , often because you are angry or afraid （使）（肌肉或身体某部位）变得僵硬，变得僵直，绷紧 |
| Her stomach tightened, anticipating the fight that was to come. 预料到即将有战斗，她的肚子绷得紧紧的。 |
| | 3a | I if your mouth tightens or your lips tighten , your mouth looks narrow because you are angry or annoyed （由于生气而）（嘴巴）撅起，（双唇）紧闭 | |
| | 3b | I if your hand tightens or your fingers tighten , you hold something more tightly 紧抓；紧握 | |
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| 4 | T to make a set of rules stricter or harder to avoid 使（制度）更严格 |
| a bill that will tighten trading rules 建议制定更严格的贸易规章的议案 |
| tighten control The government wants to tighten its control on the press. 政府想加强对新闻出版的管理。 |
| | 4a | to make an arrangement for guarding or protecting something more effectively 加强保护 | | Security at foreign consulates was tightened after the attack. 在那次袭击后，外国领事馆的安全措施加强了。 | |
| PHRASES |
| - | tighten your belt
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| to spend less money |
| 勒紧裤带少花钱；省吃俭用 |
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| - | tighten your grip on sth
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| 1 | to hold someone or something more firmly 用力抓紧；用力握紧 | He tightened his grip on her arms, making her wince. 他用力抓住她的手臂，疼得她直往后退。 | |
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| 2 | to begin to control someone or something more strictly 加强控制；加强管理 | The military government has tightened its grip on the province. 军事政府加强了对该省的控制。 | |
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| PHRASAL VERBS |
| - | ˌtighten ˈup |
| PHRASAL VB |
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| 1 | I/T tighten |
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| 2 | I to be stricter or more serious about something such as a policy or rule 加强；对…更严格；对…更认真 | +on My first priority is to tighten up on discipline. 我觉得最重要的是要加强纪律。 | |
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