What the writer meant, I think, was singleness of mind, holding steadfastly to the purpose in mind, without being drawn aside by less worhty objects. 请问hold在文中怎么理解?
Government cannot inject a single dollar into the economy if it has first taken that same dollar out of economy.改错。请问老师,下面这个解析是不是有错误,1.inject...应该发生在take...之后?2.是否可以把if改成unless?