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三字母组 [sān zì mǔ zǔ]
trigram
- 簿记员）是英文中唯一含有连续三组重复字母的字。
"Bookkeeper" is the only word in the English language that has 3 sets of double letters all in a row. - 权限是用下面九个字母公告的，这九个字母作为三组显示。
The permissions are declared with the following nine letters, which are shown in groups of three.
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中国词汇量第二的英语词典
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