"走出书店" 的英文表达是 "walk out of the bookstore"。

"walk" 是英文中的动词，意思是 "走"。"out" 是介词，意思是 "出"，"of" 是介词，意思是 "从"。"bookstore" 是名词，意思是 "书店"。

下面是一些例句：

I will walk out of the bookstore as soon as I finish my book. (我会在看完书后立刻走出书店。)
He walked out of the bookstore with a satisfied smile on his face. (他带着满意的笑容走出书店。)
She walked out of the bookstore with a stack of books in her arms. (她抱着一堆书走出书店。)