To me, direct experience of what I later came to call virtual communities preceded theories about the ways people do things together online.

对我而言，直接体验先于理论思考。我是先体验了被我后来称之为的“虚拟社区”，而对线上人们一起做事方式的理论思考，则在此后。

youdao

We call this interface virtual because there is no "real" service provider for it.

我们将调用此虚拟接口，因为没有为它提供真正的服务提供程序。

youdao

Research has shown that most virtual invocations have only a single target for all receiver objects, and JIT compilers can generate more-efficient code for a direct call than for a virtual invocation.

研究表明：大多数虚调用只有一个目标对应于所有的接收方对象，而JIT编译器可以为直接调用生成比虚调用更有效率的代码。

youdao

Analysts call this a virtual database because it can query and analyze without moving any of the data out of position.

FORBES: Data Of Reckoning

These virtual call centers are one company's answer to the offshoring question: How do you cut costs while keeping jobs at home?

FORBES: The Slipper Solution

Virtual actors or game characters are another possibility - and then there is the prospect of virtual carers or call centre employees.

BBC: Zoe �C Cambridge��s emotional talking head