upgrade /ˈʌpˌgreɪd, -ˈgreɪd/ star2 CET6 TEM4 (upgrading,upgraded,upgrades)

• 1.  

  V-T（及物动词） If equipment or services are upgraded, they are improved or made more efficient. 使升级 [usu passive]

  例：

  Helicopters have been upgraded and modernized.

  直升机已经升级并且装上现代化设备。

• 2.  

  N-COUNT（可数名词） Upgrade is also a noun. 升级

  例：

  ...equipment which needs expensive upgrades.

  …需要进行昂贵升级的设备。

• 3.  

  V-T（及物动词） If someone is upgraded, their job or status is changed so that they become more important or receive more money. 提升 [usu passive]

  例：

  He was upgraded to security guard.

  他被提升为保安。

• 4.  

  V-T/V-I（及物动词/不及物动词） If you upgrade or are upgraded, you change something such as your plane ticket or your hotel room to one that is more expensive. 使升舱; 使 (旅馆房间等) 升级; 升舱; 升级

  例：

  His family was upgraded from economy to business class.

  他的家人从经济舱升到了商务舱。