back end
noun uk/ˈbæk ˌend/ us/ˈbæk ˌend/
(BACK PART)
[ C ]（物体的）尾部，（地方的）最远处
the part of an object or place that is furthest from the front
He made the car's back end blunter and more aerodynamic. 他让汽车尾部变得粗短一些，更符合空气动力学原理。
[ C ]（人或动物的）屁股
a person's or animal's bottom
A cow will always turn around and smell the back end of a calf. 母牛总是会转过身去闻小牛的屁股。
- More examples
- The shape of the car's back end gives it more drag than most cars.
- The emergency exits are at the front and back ends of the train.
- The baby and I moved to the back end of the house so the rest of the family could sleep.
- He's got a big back end on him, he looks very powerful.
- About half of this carbon dioxide comes out of the back ends of cattle.
- If you cause trouble it might come back and bite you in the back end.
(LAST PART)
[ S ]（过程、活动或时间段的）后期，结尾处
the last part of a process, series of events, or period of time
We're not willing to spend on the front end - education for these kids - so we pay at the back end, for problems with crime and violence. 我们不愿意在前期花钱，也就是教育这些孩子，所以就得在后期为犯罪和暴力问题买单。
- More examples
- About one third of hospital medication errors happen at the front end, when a doctor prescribes the wrong drug or the wrong dose. But then there is the back end: a medication administered to the wrong patient.
- Covering everyone with medical insurance up front would actually save money, he said. "It actually costs us more on the back end."
- It's hard to reconstruct 12 months' worth of spending at the back end.
- "The real impact will be on the back end," Foster said. "In four or five years, we will see an impact."
(COMPUTING)
[ C ] computing specialized（电脑系统的）后台，后端
the part of a computer system, piece of software, etc., where data is stored or processed rather than the parts that are seen and directly used by the user
Two of the most popular SQL back ends are MySQL and SQL Server. 其中最流行的两个SQL后端是MySQL和SQL 服务器。
- More examples
- A back end may be a database server that responds to SQL requests from a workstation running a front end application.
- The server at the back end controls the information flow to the mobile handsets.
- This is a Web-based solution designed for expanding corporate information centres, with new features and a new back end.
Idiom
look like the back end of a busidiom UK informal 看起来就像公车尾部，毫无吸引力，不好看
to look very unattractive
She may object if she is photographed looking like the back end of a bus. 要是被拍到不好看的样子，她有可能会不高兴的。