How many letters we wrote 我们写过多少封信
how many letters
多少个字母？
以上为机器翻译结果，长、整句建议使用 人工翻译 。
How many letters are in the alphabet?
字母表里有多少个字母呢？
youdao
How many letters have you written to your mother?
你给你母亲写了多少封信？
How many letters are there in your name?
您的名字中有几个字母？
As far as how many letters, nobody can tell for sure whether the letters sent and recovered were the only letters.
CNN: "The Secret Life of Germs" author Philip Tierno
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