| 单词 | 升级改造 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔retrofit〕Many hospitals are struggling to pay for the retrofits.许多医院都缺乏升级改造的经济能力。剑桥高阶〔upgradation〕The Centre has approved projects worth about Rs 40 crore for the upgradation of industrial estates in the city.中心批准了价值4亿卢比的项目，对城内的工业区进行升级改造。剑桥高阶〔upgrade〕They upgraded the hotel to attract more business patrons.他们升级改造酒店以吸引更多的商界客户。韦氏高阶 |
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