短語(yǔ)詞組用作動(dòng)詞 (v.)～+名詞upgrade the land 提高土地等級(jí)upgrade the pay 提高工資upgrade the status 提高地位～+介詞upgrade to 提高到…標(biāo)準(zhǔn)〔級(jí)別〕短語(yǔ) 返回 upgrades