This is the 3867th most frequent Chinese word.
sam
"Sam" has no inherent meaning in standard Chinese; it may represent a transliteration or a name.
The word 'Sam' in this sentence is used as a proper noun to refer to the name of a person.
Sam喜欢阅读科幻小说。
Sam enjoys reading science fiction novels.
Here, 'Sam' again functions as a proper noun, representing someone's name in communication.
我见过Sam，他是一个很好的人。
I have met Sam, he is a very kind person.
In this context, 'Sam' is a nickname chosen for ease of pronunciation.