y what means 是固定短语 =how
所以 by what means the Book lost its old position in this country是主语从句
it是形式主语
原句=how the Book lost its old position in this country is an interesting speculation .
y what means 是固定短语 =how
所以 by what means the Book lost its old position in this country是主语从句
it是形式主语
原句=how the Book lost its old position in this country is an interesting speculation .