translate two phrases

Can anyone translate these two phrases into English, please?
Nani ko wakatteru desu ka?
and
Tsurue desu.

ありがとう ^_^

Something does not quite sound right with the first sentence - are you sure of the words?

The sentence I can "imagine" is:
- Nani kA wakatteru NO desu ka?
... which can mean "Do you know what it is?" or "Do you know anything about it?"

Tsurue desu
... I can only imagine that this is saying "It (the name/my name) is Tsurue."

Thanks for the fast reply and for explanation!

Maybe I misheard about the second phrase. It should have meaning like ''doubly''. So what is Japanese word for''doubly'' then?

Thanks!

The word for "double/doubly" would be "nijuu." This doesn't sound like "tsurue" at all though :( I wonder what it was.

Thanks again!
So do I. I've heard the word in one anime and it was translated as I wrote. Strange thing...

1:
Nani kowaGatteru N desu ka?
What are you afraid of? (What do you fear?)

2:
TsurEe desu
It is painful.

It seems to me that these are the right ones.
Thank you very much for the help, Hiro and AK!