pangram       
noun [ C ]  language specialized uk/ˈpæn.ɡræm/ us/ˈpæn.ɡræm/
 全字母短句(指包括所有26个英文字母的短句)
a sentence that contains every letter of the alphabet, if possible with each letter only being used once
  A familiar example of a pangram, though with duplications, is the typists' test sentence: The quick brown fox jumps over the lazy dog. 举一个大家都熟悉的全字母短句的例子,虽然有些重复,但却是考验打字的一个测试句:The quick brown fox jumps over the lazy dog. 
 - More examples
 - The most challenging pangrams are the ones with the fewest letters.
 - Everybody knows one or two pangrams.
 - In his chapter on wordplay he discusses palindromes and pangrams.
 - One measure of a pangram's quality is its shortness.