virtual
/ˈvɜːtʃʊəl/adjective
1
- almost or nearly as described, but not completely or according to strict definition实际上的; 实质上的, 事实上的：
the virtual absence of border controls.
边境检控的实际缺失。
2
- Computing not physically existing as such but made by software to appear to do so【计算机】虚拟的：
a virtual computer.
虚拟计算机。参见VIRTUAL REALITY.
2.1
- carried out, accessed, or stored by means of a computer, especially over a network虚拟的：
a virtual library
虚拟图书馆
virtual learning.
虚拟学习。
3
- Optics relating to the points at which rays would meet if produced backwards【光学】虚的, 虚拟的。
4
- Mechanics relating to or denoting infinitesimal displacements of a point in a system【机械学】虚的。
5
- Physics denoting particles or interactions with extremely short lifetimes and (owing to the uncertainty principle) indefinitely great energies, postulated as intermediates in some processes【物理】虚的。
派生词
virtuality
/ˌvɜːtʃʊjʊˈælətɪ/ noun词源
late Middle English （also in the sense 'possessing certain virtues'）： from medieval Latin virtualis, from Latin virtus 'virtue'， suggested by late Latin virtuosus.