... test-retest relability 测验与重测信度 tetragraph 四合字；四合字母；由四个字母组成的词 tetraphthong 四合元音 ...
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由九个字母和四个音节组成的，发音饶舌的“现象”一词成为英语里面最难念的单词。
With nine letter and four syllables, the tongue-twisting "phenomenon" has been named as the most mispronounced word in the English language.
由九个字母和四个音节组成的，发音饶舌的“现象”一词成为英语里面最难念的单词。
With nine letter and four syllables, the tongue-twisting 'phenomenon' has been named as the most mispronounced word in the English language.
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