一封已打好的信 an already typed letter
打一封信
Type a letter
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他滴滴答答地打一封信给他的爱人。
Pounding on his typewriter, he types out a letter to his lover.
youdao
我希望您不反对我在这儿打一封信。
I hope you don't mind my typing a letter here.
她让莉尔打一封信，然后便离开了。
She directed Lill to type a single letter, and then left.
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