According to 10 investigations from 1955-2000, the height growth of the teenagers inShanghai kept speeding up secularly.
从1955年到2000年10次的调研结果来看，上海市青少儿身高发育持续地保持着长期加速趋势。
Therefore, in order to protect the healthy growth of teenagers, preventing and reducing crime, need for juvenile positive education of legal system, correct guidance.
因此，为了保护青少年健康成长，预防和减少犯罪，就需要对青少年进行正面的法制教育，正确引导。
Dangerous behavior means bad behavior which directly or potentially threatens the health and growth of teenagers now and in the future.
危险行为是指直接或潜在地威胁着青少年现在及将来的健康和成长的不良行为。
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