任何一个语言阶段，都可能会谈论不可观察对象。
There never was a stage of language at which it was impossible to talk about unobservables.
一个可观察对象是一个事件流，我们可以用数组型操作符来处理它。
An observable is a stream of events that we can process with array-like operators.
如果一个类希望在可观察对象变化时得到通知，它可以实现Observer接口。
A class can implement the Observer interface when it wants to be informed of changes in observable objects.
如果一个类希望在可观察对象变化时得到通知，它可以实现Observer接口。
Interface Observerpublic interface ObserverA class can implement the Observer interface when it wants to be informed of changes in observable objects.
简而言之：如果一个“观察术语”原则上只用于只可观察对象，那么就没有观察术语。
In short: if an "observation term" is a term which can, in principle, only be used to refer to observable things, then there are no observation terms.
像这样一个请求-取消-新请求的序列用承诺是很难实现的，但接下来我们会看到，它对于可观察对象却很简单。
Such a request-cancel-new-request sequence is difficult to implement with Promises. It's easy with Observables as we'll see.
研究对象应该是可观察的行为而不是内部思想过程。特别地，学习由行为的变化表征。
Observable behavior rather than internal thought processes are the focus of study. In particular, learning is manifested by a change in behavior.
那些主要涉及那些卡尔纳普归类为“不可观察的对象”的术语不是理论术语；
Many terms that refer primarily to what Carnap would class as "unobservable" are not theoretical terms; and at least some theoretical terms refer primarily to observables.
那些主要涉及那些卡尔纳普归类为“不可观察的对象”的术语不是理论术语；
Many terms that refer primarily to what Carnap would class as "unobservable" are not theoretical terms; and at least some theoretical terms refer primarily to observables.
应用推荐