cop是什么意思中文 COP是什么意思？( 二 )
另一则引文：
[Q] From Billyboy Mackey: “Could you possibly tell me the origin of the slang term for policemen, cops?”
[A] Half a dozen explanations at least have been put forward for this one, including an acronym from “constable on patrol”, which is reminiscent of the story behind posh and quite certainly just as spurious. It is also said to come from the copper badges carried by New York City’s first police sergeants (patrolmen were alleged to have had brass ones and senior officers silver); it is almost as often said to refer to the supposedly copper buttons of the first London police force of the 1820s. Both these stories seem about equally unlikely.
The most probable explanation is that it comes from the slang verb cop, meaning “to seize”, originally a dialect term of northern England which by the beginning of the nineteenth century was known throughout the country. This can be followed back through the French caper to the Latin capere, “to seize, take”, from which we also get our capture.
The situation is complicated because there are—or have been—a number of other slang meanings for cop, including “to give somebody a blow”, and the phrase cop out, as an escape or retreat. Both of these may come from the Latin capere. But it’s suggested that another sense of cop, “to steal”, could come from the Dutch kapen, “to take or steal”. There’s also “to beware, take care”, an Anglo-Indian term from the Portuguese coprador, and phrases like “you’ll cop it!” (“you’ll be punished, you’ll get into trouble”), which could come from the idea of seizing or catching, but may be a variant of catch.
Q5：cop解释意思有几种两种，cop作动词时是“抓住”，作名词时是“警察，巡警'的意思 。
Q6：COP是什么意思？【cop是什么意思中文 COP是什么意思？】COP值在ARI标准（美国空调与制冷协会）里有着更为详细的定义，即制热与制冷分别由不同的名字去定义 。在制热时，制热量与总输入功率的比值称为热泵的循环性能系数，即COP 。
而在制冷时，该电器的制冷量与总输入功率的比值则被称为热泵的能效比，即EER 。往往有人分不清这两者的区别，其实COP与EER的区别本来就很小，为了方便计算，就规定了电器热泵的循环性能系数和能效比都统一的采用COP来表现 。
热泵的能量转换
作为自然界的现象，正如水由高处流向低处那样，热量也总是从高温区流向低温区 。但人们可以创造机器，如同把水从低处提升到高处而采用水泵那样，采用热泵可以把热量从低温抽吸到高温 。
所以热泵实质上是一种热量提升装置，热泵的作用是从周围环境中吸取热量，并把它传递给被加热的对象（温度较高的物体），其工作原理与制冷机相同，都是按照逆卡诺循环工作的，所不同的只是工作温度范围不一样 。
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