What are the exact differences between the following words? eminent outstanding remarkable excellent brilliant topping splendid distinguished prominent

What is the differences between the estimate and evalute and assess?

What difficulties do the foreigners have when they learn Chinese?

Now, more and more foreigners are begining to learn chinese.

so, do they have any difficulties? If it was , what difficulties?

When you listen to a native chinese person speak, is the speaking is too fast to follow? Is the chinese writing too difficult for a foreigner?