chinese learning difficulty

If you think learning Chinese have any difficulty, please leave your questions, I will answer for you.

如果你想学习中文有什么困难，请留下您的疑问，我将会对你的问题进行回答。

But now the "rhyme with tone" and "rhyme" of Chinese historical phonology don "t accord with this demand." Therefore this phenomenon adds difficulty to the learning and academic study in this field.

目前汉语音韵学的“韵”和“韵部”不符合这一要求，给学习和研究增加困难。

In some foreigners eyes', the learning of Chinese has become the most difficult thing for them. The tones of Chinese and Chinese characters all seem to be a difficulty.

在一些外国人看来，学习中文已成为他们最为头疼的事情。汉语的语调和汉字好像都是个难题。那么到底是什么原因使中文这么难学的呢？