I am learning American English, but I don't know which dictionary to use.

1 Cambridge Dictionary of American English, contains reading tools and a dictionary library with built-in explanatory entries for nearly 40,000 words, which is very easy to use.

2 Collins COBUILD Advanced Dictionary of American English English name: Collins COBUILD Advanced Dictionary of American English region: American language

3 Cambridge Dictionary of American English MSDict Cambridge Dictionary of American English 5 for PPC

4 The Longman Advanced Dictionary of American English and Chinese is the quintessential American dictionary, with its rich encyclopedic entries covering all aspects of American culture.

In addition to the above, American English dictionaries, besides those mentioned above, are also internationally renowned with the two major brands of Webster's Dictionary (Webster) and American Heritage Dictionary (American Heritage). The American Heritage English-Chinese Dictionary for Learning and the Webster's Advanced American English-Chinese Dictionary have been introduced and published in China.

I hope the owner is satisfied.