upgrade
美[ˈʌpˌɡred] vt.提升；使（机器、计算机系统等）升级；提高（设施、服务等的）档次；提高（飞机乘客、旅馆住客等）的待遇
网络升级；增加；提升；上坡
1 . You can upgrade from self-catering accommodation to a hotel.
您可以将自理膳食旅店升级为酒店。
来自柯林斯例句
2 . to upgrade the town's leisure facilities
改善镇里的休闲设施
来自《权威词典》
3 . We need to upgrade the status of teachers.
我们需要提升老师的地位。
来自辞典例句
4 . So we're going to upgrade you and your friend to first class.
所以我们会将您和您的朋友升等到头等舱.
来自常春藤生活英语杂志-2006年3月号
5 . Thefts have been on the upgrade .
盗窃案已在增多.
来自辞典例句
1.an upward slope or grade (as in a road);
the car couldn't make it up the rise
2.software that provides better performance than an earlier version did
3.a reservation that is upgraded;
I got an upgrade to first class when coach class was full
4.the property possessed by a slope or surface that rises
5.hardware that provides better performance than an earlier version did
6.the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components);
the power plant received a new upgrade
1.rate higher; raise in value or esteem
2.to improve, especially something that was old or outdated;
I've upgraded my computer so I can run better software
3.give a promotion to or assign to a higher position;
John was kicked upstairs when a replacement was hired
4.get better travel conditions;
I upgraded to First Class when Coach Class was overbooked
5.give better travel conditions to;
The airline upgraded me when I arrived late and Coach Class was full