Casterline worked as a guidance counselor for 27 years and an FBI Agent for 10 years.

其任教育咨询师长达27年，还担任过10年联邦调查局特工。

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Roger Casterline is a fulltime writer and counsel's troubled youth in his community. Mr.

罗杰·凯斯特琳是一位全职作家，擅长为青少年教育问题提供指导。

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"We want to minimize population growth, and the only viable way to do that is through more effective family planning," said Casterline.

他接着说：“要想减少人口增长，唯一可行的方法就是借助更有效的生育控制项目。”

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