virtual

形容词 virtual:

1. being actually such in almost every respect
   同义词：practical
2. existing in essence or effect though not in actual fact

1. In a virtual storage system, a fixed-length block that has a virtual address and that is transferred as a unit between real storage and auxiliary storage.
   在虚拟存储(器)系统中，具有一个虚拟地址并且可以在实存储器和辅助存储器之间作为一个单位来传送的一种长度固定的(数据)块。
2. For　example, in a Virtual space, Students can "dissect" a human body, "visit" ancient battlefields, or "talk" with Shakespeare, ...
   如，在虚拟的空间中，学生们可以“解剖”人体，“参观”古战场，与莎士比亚“对话”等等。
3. Our deputy manager is the virtual head of the business.
   我们的副经理是公司的实际负责人。
4. A virtual state of war exists between the two countries.
   这两国间实际上处于战争状态。

vir.tu.al

adj.（形容词）
Existing or resulting in essence or effect though not in actual fact, form, or name:
实质上的，实际上的：虽然没有实际的事实、形式或名义，但在实际上或效果上存在或产生的：
例句：
the virtual extinction of the buffalo.
野牛实际上已经绝迹

Existing in the mind, especially as a product of the imagination. Used in literary criticism of text.
虚的，内心的：在头脑中存在的，尤指意想的产物。用于文学批评中

来源：
Middle English virtuall [effective]
中古英语 virtuall [有效的]
from Medieval Latin virtu3lis
源自 中世纪拉丁语 virtu3lis
from Latin virtôs [excellence] * see virtue
源自 拉丁语 virtôs [优秀] *参见 virtue

【引伸】
vir.tual.ity