A deserted or abandoned child of unknown parentage.
弃婴, 弃儿一个不知父母为谁的弃婴

The Clinical Diagnosis of Chest Pain Unknown Etiology Associated with Abnormal ECG in Middle Age and Youth.
中青年人原因未明的胸痛伴心电图异常的临床诊断

There's a lot of unknown, and you often don't know what it is except by its absence.
有许多未知，你不知道那是什么，只知道它不在

Whether this striking absence of pluripotency is universal is still unknown.
多能性的这种明显缺失是否是普遍的尚未可知。

Clark's maps provided information abut huge areas that had been unknown.
克拉克绘制的地图提供了大量关于未知地域的信息。

They are accelerating at rates that are wildly unknown in human history.
它们的催化作用在人类历史上也是未见过的。

Where the accident occurred is unknown.
事故发生的地方还不知道。

When this accident take place is still unknown.
这个事故在何时发生还不知道。

Accordingly, the extent of the problem remains unknown.
因此，这一问题的程度仍然不得而知。

Don't have a chat with unknown men, and do not any accosts.
不要和陌生男人聊天和接受他们的搭讪。

This ensures that our model will accurately predict future unknown values.
这就保证了我们的模型会准确地预测出未来的未知值。

He was not accustomed to having something unknown hanging over his head.
在他头上出现了不认识的事物，对此他是不习惯的。

Angry, acerbic argument was virtually unknown.
这样吹胡子瞪眼睛，舌剑唇枪的激烈争吵，可以说还从未有过。

Conclusion Bone imaging is of greater value in the diagnosis of bone ache with unknown reason.
结论骨显像对不明原因骨痛有较高得诊断价值。

While reading, at the beginning of reading, suspects are unknown. Doubts come about gradually, and then doubts are everywhere. After this stage, doubts are cleared up and mastery is achieved through a comprehensive study of the subject. Eventually there is no doubt, and that is called"study".
读书，始读，未知有疑；其次，则渐渐有疑；中则节节是疑。过了这一番，疑渐渐释，以至融会贯通，都无所疑，方始是学。

Acknowledging that God is unknown and unknowable by definition.
接受上帝本来就是未知的也不可知的这个定义

However, there are unknown risks, as trenches are tectonically active.
但海沟的地壳构造活跃，因此存在着未知风险。

The whereabouts of over a dozen of other activists taken away by the police remain unknown.
还有十多名被警方带走的维权人士至今下落不明。

The star of the film is a previously unknown actor.
这部电影里的明星以前是个默默无闻的演员。

An unknown actor was penciled in to play the leading role.
一个不知名的演员被匆忙列入计划，扮演主要角色。

Director arranged an unknown actress to play the role of queen Victoria.
导演安排了一位默默无闻的演员扮演维多利亚女皇。

The actual meaning of his message remains unknown.
他短信的真正意思一直都不为人所知。

The actual size and content of Aristotle's library are unknown.
亚里士多德图书馆的实际规模和藏书内容已无从知晓了。

Unknown ads service error. Please try downloading later.
未知得广告服务错误。请稍后重试下载。

adjustment of condition equations with unknown
未知数条件平差发