If you want to get the unknown number, you should know the known number first.
如果要想求出未知数，你首先得知道已知数。
She is known in Italy for a number of minor roles in films.
她因担任电影中一些配角而闻名意大利。
Then, there'd be an atomic number, for which there was no known element.
然后会出现原子序数，代表了未知元素。
Human breast milk is known to have a number of beneficial qualities for babies.
我们已经知道，母乳含有一些有益于婴儿的特质。
This information is classified, but has been known for a number of years10.
这个信息是机密的，但已在多年前被知道了[10]。
That haul has more than doubled the number known, and suggests such planets are common.
这些已知行星的数量增至过去的2倍，并显示了这些行星的普遍存在。
The exact number of applicants is not known, with the final day for applications today.
今天是2006年国家公务员考试报名的最后一天，目前还未统计出准确报考人数。
Number of different species: 20, 000 known species of bee.
不同种类数量：已知蜜蜂种类20 000。
To prevent these various forms of attack, you can apply a number of well-known techniques.
要防止这些各种形式的攻击，您可以应用许多众所周知的技术。
Several passengers were transported the hospital, though the exact number wasn't immediately known.
一些乘客被送至医院，但是准确的受伤人数目前还不清楚。
This solves a large number of known problems.
这解决了大量已知问题。
If I had known his number, I might have telephoned him yesterday.
我要是知道他的号码，昨天也许就给他打电话了。
The exact number of attackers is not immediately known, said a police chief, police said.
警方目前还不清楚歹徒的具体数量。
If I had known her number, I would have called her.
如果我知道她的电话号码的话，我就给她打电话了。
This is almost certainly a patent drawing, but the number is not known.
这几乎可以肯定是专利绘画，但这个数目是不知道。
How to use template when number of arguments are not known?
如何使用模板时，参数的个数都不知道？
It is how this number is known that will be described in due course.
将在适当的时候加以说明的，乃是这一数字的来源。
Stonehenge is the best known of a number of such ancient places in Britain.
巨石阵是英国一些古迹中最知名的。
The exact number is not known, but they are believed to be in the hundreds.
虽然雇佣军确切数目不详，但普遍相信有数百人。
She was well known for her habit of always looking out for number one.
如果我知道她的电话 号码，我早就打电话给她了。
No, the number is not known now.
这个数字还不知道。
The number of kinds of atoms known today is exactly 105.
到今天人们所知道的原子种类是105种。
The number of injuries is not yet known.
受伤人数尚未查明。
The number of injuries is not yet known.
受伤人数尚未查明。
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