In politics,a dark-horse candidate is someone who is not well known to the public.

VOA: special.2009.07.12

The time was in the early 70s, so factory farming was not well-known, was not as dominated as it is today, but it still existed.

那时是70年代早期，工厂化养殖并不为很多人所知,也不如今天这样占主导地位，但当时已经出现了这种方式。

普林斯顿公开课 - 人性课程节选

And it's just like a platform for that; for artists both well-known and not so well-known.

它就像是个给有名的或者还不那么有名的艺术家提供的舞台。

在布莱恩公园 - SpeakingMax英语口语达人

Its actors are not well known in the United States.

VOA: special.2009.02.20

I want to play this one with the piano a little bit and I ask you the name of the composer of this piece-- it's a bit less well known but maybe not-- what it's called and when in the history of music it was written.

我会用钢琴演奏一小段,然后我会问它的作曲是谁,这曲子有点不太知名,也说不准,它叫什么,在音乐史上是什么时期创作出来的

耶鲁公开课 - 聆听音乐课程节选

Sign languages vary from country to country,and many are not well known internationally.

VOA: standard.2009.09.10

June Simms has more. Steve Martin is well known for many things, but music is not one of them.

VOA: special.2009.07.17

The top leaders are always well-known, but not those who work with the nuts and bolts.

VOA: special.2009.11.01

Tanya Pinto says you do not have to be wealthy or well known to help others.

VOA: special.2009.08.10

Lincoln was not well-known. So the Republican Party published many books and pamphlets about him.

VOA: special.2009.07.09

The biathlon is another Olympic sport that is not as well known.

VOA: special.2010.02.10

Others are more difficult to identify and not as well known.

VOA: special.2009.04.14

Others are not as well known.

VOA: special.2010.06.15

"Even (Supreme Leader Ayatollah) Khamenei realized that they should not do this with a well-known journalist,".

VOA: standard.2009.05.06