1.
the unknown radioactive element
不知名的放射性元素
2.
An article whose name is unknown or forgotten.
小玩意不知名的或忘记名称的物件
3.
Many unknown writers aspire to fame.
许多不知名的作家渴望成名。
4.
an unknown amount; an unknown island; an unknown writer; an unknown source.
未知的数量；未知的岛屿；不知名的作家；未知的原始资料。
5.
And suppose I don't know either the title or the author,
假设我既不知道书名，又不知道作者名，
6.
It does not know their names, even.
甚至不知道他们的名字。
7.
"I don't know your name," he said.
“我不知道尊姓大名,”他说。
8.
I don't know your real name.
我不知道你的真实姓名。
9.
His name was unknown to the world.
他的名字不为世人所知。
10.
having no known name or identity or known source.
不知道姓名或身份，或者不知道来源。
11.
then even if you don't know either the title or the author,
即使你既不知书名也不知作者，
12.
One that is unknown or unacknowledged.
匿名者，无名氏不被认识或知道的人
13.
otherwise know as or using the name of
别名叫，化名为，要不然被人所知；或用一个名字
14.
Xiangzi dared not be more specific for he still did not know where he was.
祥子不敢说地名，因为不准知道。
15.
If you don't know the title of the book, you can look under the author's name.
如果您不知道书名，您可以在作者名下找。
16.
In Hollywood, there are many relatively unknown siblings of famous stars.
在好莱坞，许多知名影星有较不出名的兄弟姐妹。
17.
An unknown or unnamed factor, thing, or person.
未知之（人）物，不知道的或未命名的因素、物体或人
18.
You seem to know my name but you have the advantage of me, because I don't know yours.
你似乎知道我的名字，可是您贵姓？我不知道您的尊姓大名。