virtual

在效果或本质上而非事实上或现实中存在的；也指模仿的、模拟的。

In effect or essence, rather than in fact or reality; also, imitated, simulated.

几乎等同于实际

being actually such in almost every respect

实际上(虽非严格意义上)几乎完全或非常接近的。

For practical purposes, though not technically; almost complete, very near.

虽非实际但本质上存在

existing in essence or effect though not in actual fact

通过计算机和/或网络操作而非物理存在的。

Operating using a computer and/or online rather than physically present.

在计算机和/或网络中模拟的。

Simulated in a computer and/or online.

(类成员)可在子类中用不同实现覆盖的。

Of a class member: capable of being overridden with a different implementation in a subclass.

(力学系统中)不违反约束的理论无限小速度的；也指其他物理量由此速度产生的。

Pertaining to a theoretical infinitesimal velocity in a mechanical system that does not violate the system's constraints; also, of other physical quantities: resulting from such a velocity.

(水头等)忽略摩擦等因素时产生特定压力的理论性质的。

Pertaining to a theoretical quality of something which would produce an observable effect if counteracting factors such as friction are disregarded; specifically, of a head of water: producing a certain pressure if friction, etc., is disregarded.

(焦点或点)光或其他辐射看似由此发出的；或(图像)由看似从反射或折射面外某点发散的光产生的。

Chiefly in virtual focus: of a focus or point: from which light or other radiation apparently emanates; also, of an image: produced by light that appears to diverge from a point beyond the reflecting or refracting surface.

(量子态)具有中间、短暂且不可观测性质的。

Of a quantum state: having an intermediate, short-lived, and unobservable nature.