"I don't understand this sentence."

Translation: 我不明白这个句子。

[Patrick_Dark]

We learned to use "懂" in a previous lesson, so allowing "不懂" here would seem to make sense.

[KX3.]

Yes, but that is more colloquial.

[Bloxlusion]

懂 means "know" while 明白 means "understand".

[JonnyEightyFour]

I tried to be fancy and use 了解 instead of 明白 and it rejected my answer. Any particular reason why I was wrong? Or should I report it?

[matthai]

I had the same thought -- and was also marked wrong. I reported it, but I could be wrong.

[Bloxlusion]

Although I may not be correct, but I think that answer should be accepted.

[matthai]

why can't i write 我不了解这个句子？

[NguyenThie676925]

What is the different between “懂” and ”了解“ and "明白“ ?

[deactivated user]

Is 个 really the best measure word to use for 句子?

[KX3.]

I think so.

[Bloxlusion]

Yes, it is.