sending acknowledgement发送: transmit by radio; transmiss ...确认: affirm; confirm; acknowledge ...信息: information; message; news确认信息: acknowledgment message反向确认信息: backward acknowledgement information下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:发送确认信息，即可在微信中查询翻译
