letter
phone call
voicemail
/ˈvɔɪsmeɪl/
a system which lets people leave recorded messages for you on your telephone when you are unable to answer it
语音信箱;电话留言
text message
social networking
communication with people who share your interests using a website or other service on the Internet
memo
a short official note to another person in the same company or organization
备忘录
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