關於acknowledge的字義，我覺得應該查詢一下
字典的解釋，最好是那種英文解釋英文的純英文
字典。另外，也應該區別一下英語字典跟美語字
典可能有些微的字義差異。實際上澳洲英語的字
義可能會跟英國英語的差別，來得比美國英語的
差別更大。
由於中美建交公報是「美式英文─簡體中文」的
兩種文本，所以在確認外交用語的字義上若要做
到精確、有效的程度，就應該回歸到正確的語言
字典。下面我查了4個字典，其中科林氏字典有
區分美國用法和英國用法，感覺上美國的用法，
acknowledge的字義似乎確實比較沒有「承認」
的意味，而是「接受、了解」的意味較重。不過
其他3種字典則有些有查詢到「承認」的意思。
我覺得這可能要對美國文學與美式英語用法進行
更深入研究，會比較能得出具體有益的詮釋。
以下是查尋的結果
(附上之前Lu331提供的AIT解釋頁面)
關於acknowledge的字義，查詢幾部網路字典
的結果如下：
【劍橋英語辭典】
https://dictionary.cambridge.org/zhs/
查詢結果：
(1)to accept, admit, or recognize something,
or the truth or existence of something
承認；認可…屬實或存在
(2)to tell someone, usually in a letter or
email, that you have received something
they sent you
（通過信函或電子郵件等）確認收悉
【韋伯字典】
https://www.merriam-webster.com/
查詢結果：
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
【牛津學生字典】
https://www.oxfordlearnersdictionaries.com/
查詢結果：
(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
查詢結果：
(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
【美國在臺協會官網資料】
https://web-archive-2017.ait.org.tw/zh/officialtext-ot0926.html
我能肯定美國在北京私下和公開發表的聲明，包括《美中聯合聲明》，
不代表美國對台灣主權的立場有任何改變。美國對台灣地位的立場，包
含在美國與中國從1972年到1979年簽署的《聯合公報》之中，在公報中
聲明了美國「認知中國的立場，即只有一個中國，台灣是中國的一部分」。
這也是美國最後一次對於台灣的地位發表聲明。
過去三十七年來，美國明白表示「認知」不代表認可、不代表接受，除了
「認知」以外不代表任何意義。過去三十七年來，有許多場合都有人對美
國施壓，要求美國在台灣主權問題上採取更明確的立場，美國從來都不曾
同意。美國向來敦促任何台灣海峽兩岸之間的議題，都應該和平解決，並
且得到海峽兩岸人民的同意