| 单词 | upgrade |
| 释义 | upgradeupgradesupgradedupgradingupgradeupgrade /ʌpˈgreɪd/ verb [transitive] to improve something, or change it for something better: We need to upgrade our computer.我们需要给电脑升级。—upgradeupgradesupgrade /ˈʌpgreɪd/ noun [countable] |
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