关于acknowledge的字义，我觉得应该查询一下
字典的解释，最好是那种英文解释英文的纯英文
字典。另外，也应该区别一下英语字典跟美语字
典可能有些微的字义差异。实际上澳洲英语的字
义可能会跟英国英语的差别，来得比美国英语的
差别更大。
由于中美建交公报是“美式英文─简体中文”的
两种文本，所以在确认外交用语的字义上若要做
到精确、有效的程度，就应该回归到正确的语言
字典。下面我查了4个字典，其中科林氏字典有
区分美国用法和英国用法，感觉上美国的用法，
acknowledge的字义似乎确实比较没有“承认”
的意味，而是“接受、了解”的意味较重。不过
其他3种字典则有些有查询到“承认”的意思。
我觉得这可能要对美国文学与美式英语用法进行
更深入研究，会比较能得出具体有益的诠释。
以下是查寻的结果
(附上之前Lu331提供的AIT解释页面)
关于acknowledge的字义，查询几部网络字典
的结果如下：
【剑桥英语辞典】
https://dictionary.cambridge.org/zhs/
查询结果：
(1)to accept, admit, or recognize something,
or the truth or existence of something
承认；认可…属实或存在
(2)to tell someone, usually in a letter or
email, that you have received something
they sent you
（通过信函或电子邮件等）确认收悉
【韦伯字典】
https://www.merriam-webster.com/
查询结果：
Definition of acknowledge
acknowledged; acknowledging
transitive verb
1 : to recognize the rights, authority, or
status of They acknowledged him as their leader.
2 : to disclose knowledge of or agreement with She
readily acknowledged her mistake.
3 a : to express gratitude or obligation for acknowledge
a gift
3 b : to take notice of failed to acknowledge my greeting
c : to make known the receipt of acknowledge a letter
4 : to recognize as genuine or valid acknowledge a debt
【牛津学生字典】
https://www.oxfordlearnersdictionaries.com/
查询结果：
(1)admit
to accept that something is true
(2)accept status
to accept that somebody/something has a particular
authority or status
(3)reply to letter
acknowledge something to tell somebody that you
have received something that they sent to you
(4)smile/wave
acknowledge somebody/something to show that you
have noticed somebody/something by smiling, waving,
etc.
(5)express thanks
acknowledge something to publicly express thanks
for help you have been given
【科林氏字典】
https://www.collinsdictionary.com/dictionary/english
查询结果：
(1)acknowledge in British
1. (may take a clause as object)
to recognize or admit the existence, truth,
or reality of
2. to indicate recognition or awareness of, as by a
greeting, glance, etc
3. to express appreciation or thanks for
to acknowledge a gift
4. to make the receipt of known to the sender
to acknowledge a letter
5. to recognize, esp in legal form, the authority,
rights, or claims of
(2)acknowledge in American
1. to admit to be true or as stated; confess
2. to recognize the authority or claims of
3. to recognize and answer (a greeting or greeter,
an introduction, etc.)
4. to express thanks for
5. to state that one has received (a letter, gift,
favor, payment, etc.)
6. Law
to admit or affirm as genuine; certify in legal
form
【美国在台协会官网资料】
https://web-archive-2017.ait.org.tw/zh/officialtext-ot0926.html
我能肯定美国在北京私下和公开发表的声明，包括《美中联合声明》，
不代表美国对台湾主权的立场有任何改变。美国对台湾地位的立场，包
含在美国与中国从1972年到1979年签署的《联合公报》之中，在公报中
声明了美国“认知中国的立场，即只有一个中国，台湾是中国的一部分”。
这也是美国最后一次对于台湾的地位发表声明。
过去三十七年来，美国明白表示“认知”不代表认可、不代表接受，除了
“认知”以外不代表任何意义。过去三十七年来，有许多场合都有人对美
国施压，要求美国在台湾主权问题上采取更明确的立场，美国从来都不曾
同意。美国向来敦促任何台湾海峡两岸之间的议题，都应该和平解决，并
且得到海峡两岸人民的同意