| 例句 |
nounverb instructions for installing an upgrade to the existing systemFrequent flyers qualify for a free upgrade. The building urgently needs an upgrade. On the flight back, we were upgraded to business class. to upgrade the town’s leisure facilities改善镇里的休闲设施 The towpath was upgraded for use by cyclists.Users can easily upgrade to the new version. We are constantly upgrading our software to meet customers’ needs. customers who want to upgrade from version 4.2 to version 4.5 |