It's just a concept but the technologies do exist in some form now.

这时是一个概念但是现在这种技术确实以某种形式存在。

youdao

A good example of this concept appears in XML in the form of parent and child elements, which provide a wrapper around related items.

该概念的一个典型示例是XML中的父元素和子元素，这些元素提供一个围绕相关项目的包装器。

youdao

The framework handles all of it for you in the form of continuations -- a very powerful concept.

框架以 continuation 的形式为您处理所有的状态 —— 一个非常强大的概念。

youdao

The latest automaker talking about dealerships and the customer experience is Ford in its overhaul of its struggling Lincoln brand, which kicks off with the launch of the upcoming Lincoln MKZ sedan, introduced in concept form at the recent Detroit auto show.

FORBES: Automakers: It's The Service, Not The Dealership

Conceptually similar to GM's AUTOnomy fuel-cell concept of 2002, the i8 like its urban-EV sibling, the i3 is radically different in one respect: BMW says it is actually going to build it, virtually as it appears in concept-car form, complete with its semitransparent body panels, butterfly doors, glowing blue grilles and laser headlights.

WSJ: Twiki, Bring the Car Around

Regardless of all the systems out there that indicate ranking or even try to capture your degree of trust in others, the very notion of trust is a personal concept that is difficult or impossible to convey in a simple form that the system can quantify.

FORBES: Serendipity Lies At The Heart Of Business Relationships