an upgrade to sth
表示对某个系统或事物进行升级时，常用介词 to 引出对象。
The company announced an upgrade to its payment system.
公司宣布对其支付系统进行升级。
升级版；改进版；上坡；坡度；升级的预订；预订升级；上坡或斜坡。；上坡或坡度(如道路)
上坡或斜坡。
An upward grade or slope.
上坡或坡度(如道路)
an upward slope or grade (as in a road)
改进的组件或替换物,通常用于技术。
An improved component or replacement item, usually applied to technology.
性能优于旧版的软件
software that provides better performance than an earlier version did
改进；升级
An improvement.
已升级的预订
a reservation that is improved
The airline offered us an upgrade to a window seat.
航空公司为我们提供了升级到靠窗座位的服务。
用法提示：此处 upgrade 是名词，作 offered 的宾语，指‘升级’的座位。
AI contextual example
This software upgrade fixes several security problems.
这次软件升级修复了几个安全问题。
用法提示：此处 upgrade 是名词，作主语，指‘软件升级版’。
AI contextual example
Moving to a larger office was a welcome upgrade for the team.
搬到更大的办公室对团队来说是一次令人欣喜的升级。
用法提示：此处 upgrade 是名词，作表语，意为‘改进’。
AI contextual example
表示对某个系统或事物进行升级时，常用介词 to 引出对象。
The company announced an upgrade to its payment system.
公司宣布对其支付系统进行升级。
表示从较低级别提升到较高级别，常用 from … to …。
She got an upgrade from a small room to a suite.
她从一个小房间升级到了一间套房。
of 引出被升级的事物，多见于正式或书面表达。
The upgrade of the old bridge will cost millions.
这座旧桥的升级将花费数百万。
最通用的“改进”义，可替换 upgrade 的抽象用法；但指具体的软件版本或已升级的预订时不自然。
较正式，多指功能、性能或品质的提升，不能指“预订升级”或“道路坡度”。
常用于软件、系统或信息的新版本，可替代“软件升级版”；但 upgrade 更强调版本或档次的大幅提升，update 也可指小修补。
多指抽象层面的进展或职位提升，不用于具体产品或预订。
非正式，侧重数量、程度或士气的增加，不能指软件或预订的升级。
grammar · medium
易错句子I got upgrade to business class on my flight.
正确表达I got an upgrade to business class on my flight.
这里的 upgrade 是可数名词，指一次具体的“升级、升舱”，单数前必须加不定冠词 an（/əpˈɡreɪd/ 以元音音素开头）。汉语名词前不加冠词，所以容易漏掉。
grammar · medium
易错句子The company released a small upgrade to fix the spelling mistake in the app.
正确表达The company released a small update to fix the spelling mistake in the app.
修 bug、刷新内容用 update（更新）；upgrade 指把旧版本换成性能更好的新版本，是“升级”。只是修补小错误时用 update 才准确。
grammar · medium
易错句子There has been a big upgrade in his English since he moved to London.
正确表达There has been a big improvement in his English since he moved to London.
upgrade 用于把旧的东西换成更好的版本（设备、软件、座位等），不能表示能力、水平“变好”；这种抽象的提高要用 improvement。
作为名词，与 'upgrade' 的两种主要含义（上坡和升级）相对，指下坡或降级。
软件升级
We need to install a software upgrade.
我们需要安装一个软件升级。
硬件升级
The computer requires a hardware upgrade.
这台电脑需要硬件升级。
系统升级
The system upgrade will improve performance.
系统升级将提高性能。
升级选项
Check the upgrade options before buying.
购买前查看升级选项。
升级路径
The company offers a clear upgrade path.
该公司提供清晰的升级路径。
与升级常关联，如软件升级
升级通常意味着版本更新
升级旨在提升性能
升级是改进的一种形式
升级常与更新交替使用
我就是升级版本。
In the movie Upgrade, the artificial intelligence claims to be the upgrade of human technology.
在电影《升级》中，人工智能声称自己是人类技术的升级版。
我可以升级你。
In the song Upgrade U, Beyoncé promises to upgrade her partner's lifestyle.
在这首歌中，碧昂丝承诺升级她伴侣的生活方式。
Choose the next layer that will help you use upgrade with more confidence.
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
座位升级
I got a free seat upgrade to business class.
我免费升舱到了商务舱。