virtual

英['və:tjuəl]美['və:tjuəl]

adj.
1. 实际上的，实质上的，事实上的
2.【物】有效的；【计】（网上）虚拟的
3.【物】虚像的
4.【古】具有可产生某种效果之内在力的

同：	[a.] practical

They could even build them by hand in a virtual world,using computerised gloves．
科学家们甚至可以戴着计算机手套，在图形构象中用手把分子做出来。收藏
A test device for flack flowing systems based on virtual instrument technology is developed.
研制基于虚拟仪器技术的高炮随动系统性能检测装置。收藏
Development Manual for 3D World Virtual Environment Software; Interim rept. Apr 1998-Nov 1999
三维世界虚拟环境软件开发手册/中期报告收藏
It was a virtual promise.
那是实质上的承诺。收藏
He was the virtual leader of the movement.
他是该运动实际上的领袖。收藏

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being actually such in almost every respect
- a practical failure
- the once elegant temple lay in virtual ruin
[同] practical, virtual
existing in essence or effect though not in actual fact
- a virtual dependence on charity
- a virtual revolution
- virtual reality

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unknown

英[ʌn'nəun]美[ʌn'nəun]

a.
1.未知的，未被确认的
2.不出名的，无名的
3.从未发生的，从不存在的
n.
1.未知的地方（或事物）
2.[C]无名者，不出名的人
3.[C]不明的情况，未知的因素
4.[C]【数学】未知数，未知量

同：	[n.] alien, terra incognita, unknown quantity, unknown region [a.] nameless, obscure, strange, unidentified
反：	[a.] known

Unknown tag error
未知的标记错误收藏
A second form of marketing pathology is speculative fever. In Western Europe and the United States this disability has not been unknown.
市场交易病态的第二种形式是投机热。在西欧和美国，这种疾病并不陌生。收藏
Chronic fatigue syndrome (CFS)： Sudden debilitating fatigue of unknown cause.
慢性疲劳症候群：不明原因的突然虚弱疲劳。收藏
Keqing's remarks pierced his heart like ten thousand arrows and unknown to himself his tears flowed.
"听得秦氏说了这些话,如万箭攒心,那眼泪不知不觉就流下来了"收藏
Van der Werf adds that this affinity will, however, be affected by other genetic changes in the virus, which at present are an unknown factor.
他还表示：但是亲和力还将受到病毒中的其它基因变异的影响，这些在目前还是未知因素。收藏

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an unknown and unexplored region
- they came like angels out the unknown
[同] terra incognita, unknown, unknown region
anyone who does not belong in the environment in which they are found
[同] alien, stranger, unknown

not known
- an unknown amount
- an unknown island
- an unknown writer
- an unknown source
[反] known
being or having an unknown or unnamed source
- a poem by an unknown author
- corporations responsible to nameless owners
- an unnamed donor
[同] nameless, unidentified, unknown, unnamed

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