"namely"是一個英文副詞，譯為「也就是;即是;換句話說」。它主要有兩種用法：
表示全部列舉，"namely"前面通常用逗號，後面不能直接用逗號，即不能用「namely ,」。例如:
Only one person can do the job, namely you。
The means of production, namely factories, mines and land should be owned by the state。
Three students were mentioned, namely John, Sarah and Sylvia。
"namely"可以用於替換"e.g."和"i.e."，用於強調一個點或換一個方式表達，但不需要接例子。"e.g."用於舉例，後面接例子，是"for example"的縮寫；"i.e."用於前面描述一個東西時，後面換一種說法說。例如:
There are many types of trees (e.g., spruce, oak, maple) in the study area。
To buy the car that I really want (i.e., a Tesla), I will have to work a lot of overtime。
以上是"namely"的主要用法，希望對你有所幫助。