信、字母 LTR ; letter
电信字母符号 Letter symbols for telecommunications
字母信息 [计] alphabetical information
字母信号系统 [计] alpha system
信号字母 Signal Letters ; signaling alphabet ; signal alphabet
字母信号 alphabetical signal ; letter signal
双字母信号 two letter signal
字母信 letter
信息的字母 alphanumeric representation of information
三字母信号 three letter signal
在每一朵花上附一个便条，以对方姓名的所有字母为信的开头。
On each flower, attach a note that USES the letters of their name, as the first letter of the message.
哪八个字母组成的单词有一封信在里面？
行首齐头式指信头数行的每行第一个字母上下对齐。
The block form refers that the first word of each line should juxtapose with each other.
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