acknowledgement
n. 承认；感谢；（作者的）致谢；回执；（表示注意到了某人或某事的）示意
复数 acknowledgements
例句
Their replies were no more than grunts of acknowledgement.
他们的回答不过是表示感谢的咕哝声。
《柯林斯英汉双解大词典》
The flowers were a small acknowledgement of your kindness.
这些花聊表谢意，感谢你的好心帮助。
《牛津词典》
This report is an acknowledgement of the size of the problem.
这个报告承认了问题的严重性。
