letter case
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letter case — 名詞
1. a written message sent to someone
1.名詞
釋義
信函
a written message sent to someone
例句
She wrote a letter to her grandmother.
2. a symbol used in writing, like A, B, C
2.名詞
釋義
字母
a symbol used in writing, like A, B, C
例句
The word 'cat' has three letters.