It does allow an empty Nil list, however.

不过它确实允许一个空的nil列表。

youdao

It calls the primary constructor with Nil (which represents an empty List object).

它调用主构造函数，并且传入Nil (Nil表示了一个空的List对象)。

youdao

(It does allow an empty Nil list, however.)

(不过它确实允许一个空的nil列表。)

youdao

Speaking to the BBC, Mr Betchley's son, Stuart, said there had been an A4 "nil-by-mouth" sign on the wall above his father's hospital bed.

BBC: Norman Betchley