自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-SING （对事实、局面等的）承认 An acknowledgement is a statement or action which recognizes that something exists or is true.
The President's resignation appears to be an acknowledgment that he has lost all hope of keeping the country together...
He appreciated her acknowledgement of his maturity.
N-PLURAL （作者的）致谢，鸣谢 The acknowledgements in a book are the section in which the author thanks all the people who have helped him or her.
N-UNCOUNT 打招呼的表示（如微笑等） A gesture of acknowledgement, such as a smile, shows someone that you have seen and recognized them.
Farling smiled in acknowledgement and gave a bow...
Mitzi nodded a perfunctory acknowledgement as her glass was filled.
N-VAR 公开致谢 An acknowledgement is a published statement in which you express your gratitude for or appreciation of something.
The benefit to the donor was an acknowledgment of the donation in a printed bulletin...
Grateful acknowledgment is made for permission to reprint.
N-COUNT （表示已收到信函等的）确认通知，收件复函 An acknowledgement is a letter or message that you receive from someone, telling you that something you have sent to them has arrived.
I have received neither an acknowledgment nor a reply.