In addition, results from other types of preschool readiness programs indicate that those who participate and graduate are less like to repeat grades, and they are more likely to complete school than readiness program, for every dollar spent on the program,taxpayers saved seven dollars by the time the graduates reached the age of 27.

　　结构划分：

　　(In addition), results (from other types of preschool readiness programs)indicate that those (who participate and graduate) are less like to repeat grades, and they are more likely to complete school than readiness program, (for every dollar spent on the program, taxpayers saved seven dollars by the time the graduates reached the age of 27.)

　　深度分析：

　　这个句子的主干：results indicate that

　　后面从句是一个并列结构：those are less like to repeat grades, and they are more likely to complete schoolthan readiness program

　　修饰一：(In addition)，介词短语

　　中文：另外

　　修饰二：(from other types of preschool readiness programs)，介词短语

　　中文：来自其他类型的学龄前预备项目

　　修饰三：(who participate and graduate)，从句，修饰those

　　中文：参加并且毕业

　　修饰四：(for every dollar spent on the program, taxpayers saved seven dollars by the time the graduates reached the age of 27.)，从句

　　注意从句里面还有一个从句，即by the time+从句 the graduates reached the age of 27，此处的by the time可看成连词，像anytime/every time/the moment一样。

　　中文：因为花在这个项目的每一美元，在毕业生27岁时，纳税人可以节约7美元

　　参考翻译：

　　另外，来自其他类型的学龄前预备项目的结果表明：那些参加过学前项目并毕业的人重读可能性更少，他们更愿意完成学校而不是预备项目，因为花在这个项目的每一美元，在毕业生27岁时，纳税人可以节约7美元。