virtual

中文： 虚拟

1. In effect or essence, rather than in fact or reality; also, imitated, simulated. · In fact a defeat on the battlefield, Tet was a virtual victory for the North, owing to its effect on public opinion.
2. For practical purposes, though not technically; almost complete, very near. · The angry peasants were a virtual army as they attacked the castle.
3. Operating using a computer and/or online rather than physically present. · a virtual assistant; a virtual personal trainer
4. Simulated in a computer and/or online. · virtual machine; virtual memory; virtual private network· The virtual world of his computer game allowed character interaction.
5. Of a class member: capable of being overridden with a different implementation in a subclass.
6. 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. · virtual displacement; virtual work
7. 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.
8. 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.