an unknown quantity
n.
未知量，难预测的事；未知数，不知底细的人（或事物）；
双语例句
List the given information and the unknown quantities.
列出给定数据和未知量。
The method has good preciseness and less unknown variables and it is convenient to be used in practice.
该方法收敛性较好，未知量少，便于实际应用。
权威例句
An unknown quantityAn unknown quantity
An unknown quantity
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1. She had known Max for some years now, but he was still pretty much an unknown quantity.
她现在认识马克斯也好几年了，但是他仍然是个大大的未知数。
《柯林斯英汉双解大词典》
2. Are an unknown quantity.
对于他们来说是一个未知的组合。
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3. The Frenchman was an unknown quantity when he arrived in north London back in 1996.
1996年，当他初到北伦敦时，这个法国人还只不过是个未知数而已。
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4. Additionally, an unknown quantity of methane in the form of hydrates (or clathrates) lies trapped beneath the polar sea floors.
此外，未知数量的甲烷以水合物(或气水化合物)的形式被困在极地海洋海底之下。
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5. Youth is the smile of the future in the presence of an unknown quantity, which is itself.
青春就是未来在向一个陌生人微笑，而这陌生人就是自己。
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6. No, that can't be it - it's simply that the casette is an entirely unknown quantity.
不会是这样的！然而，事实是，这是一盘完全未知的带子。
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7. Woodstock for them is only a picture in their textbooks, the Chicago Seven (or was it Eight?) are an unknown quantity.
伍德·斯托克对于他们来说只是教材里的一张图片，芝加哥七人(又或者是八人？)对于他们来说是一个未知的组合。
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8. By comparing the heating effect of an unknown AC signal to that from a known DC reference, metrologists can determine the RMS AC quantity (voltage or current) in terms of the DC quantity.
为了对比一个已知直流参考的未知交流信号热效应，计量人员可以确定在一段时间内直流的交流有效值(电压或电流)。
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9. Chinese cars do remain an unknown quantity to consumers, who were also once leery of the first cars imported from Japan - and later, from Mexico and South Korea.
对于消费者来说，中国汽车仍然是一个未知数，不过大家一开始对日本进口的汽车——以及后来的墨西哥车和韩国车——也曾经有过疑虑。
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10. In algebra, the sign X usually denotes an unknown quantity.
在代数里，符号X常用来表示未知数。
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11. John is a possibility for the job, but he is still an unknown quantity.
约翰可能获得这工作但现在还是个未知数。
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12. Mary is a possibility for the position, but she is still an unknown quantity.
玛丽可能获得这工作，但(能否获得)现在还是个未知数。
youdao
13. We are facing an unknown purpose unknown quantity.
们常常是对着一个未知数而前进。
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14. Under the physical coordinate, the horizontal displacement is taken as an unknown quantity, and a nonlinear problem with big displacement of solid mechanics is introduced.
采用物质坐标，用水平位移作为基本未知量，成为固体力学的非线性大位移问题。
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15. Because he's been sheltered from publicity, William is very much an unknown quantity to most of his future subjects.
由于威廉一直避开宣传，他未来的臣民大都对他实在不甚了解。
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16. Because he's been sheltered from publicity, William is very much an unknown quantity to most of his future subjects.
由于威廉一直避开宣传，他未来的臣民大都对他实在不甚了解。
youdao
an unknown quantity
