latency stage 隐藏摘要 
潜伏阶段
latency period 潜伏期
latency stage 潜伏阶段
latent 潜伏的
http://202.114.88.81/jxcg/jxcg-add1/cai/cai/files/%A1%B6%BA%BD%BA%A3%D1%A7%A1%B7/distance%20education/%BD%CC%D1%A7%BB%EE%B6%AF/charts%20and%20pubs/charts&pub.htm - 基于20个网页
潜伏期
性器期(phallic stage)
潜伏期(latency stage)
两性期(genital stage)
http://www.psyczx.com/update/7.15/youth.html - 基于1个网页
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