问题描述：
什么英语单词,根据句意
1.a written or spoken piece of information,each that you send to sb or leave for sb when you cannot speak to them yourself
2.the amount of space between two places or thing___
3.the action of asking for sth formally and politely
1.a written or spoken piece of information,each that you send to sb or leave for sb when you cannot speak to them yourself
2.the amount of space between two places or thing___
3.the action of asking for sth formally and politely
问题解答：
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