Exercise 2.55 · 习题

Exercise 2.55: Eva Lu Ator types to the
interpreter the expression

(car ''abracadabra)

To her surprise, the interpreter prints back quote. Explain.

练习 2.55：Eva Lu Ator 向解释器键入表达式

(car ''abracadabra)

令她惊讶的是，解释器打印出了 quote。请解释其原因。