學(xué)個詞 Learn A Word:1083 upgrade

今天我們要學(xué)的詞是upgrade。 Upgrade, 升級。 "The local elementary school received a library upgrade thanks to donations from the alumni association," 校友會的慷慨捐贈，讓本地小學(xué)圖書館煥然一新。
美國副總統(tǒng)官邸準備加強安全裝置。 "The Vice President's official residence is getting a $1.7 million security upgrade," 副總統(tǒng)官邸要進行耗資170萬美元的保安系統(tǒng)升級。市場調(diào)查顯示， "Many customers are putting off plans to upgrade their cell phones during the economic downturn," 經(jīng)濟不景氣，使很多顧客推遲手機升級的計劃。好的，今天我們學(xué)習(xí)的詞upgrade...