政府坚持认为“关押有效”，并计划对暴力犯罪者实行更严厉的判刑政策。
The government insists that 'prison works' and plans to introduce a tougher sentencing policy for people convicted of violent crime.
一定程度上就像我们推行校服计划的结果，越来越多的学区实行这一政策，结果是积极有效的。
Partly as a result of our promotion of school uniforms, more and more school districts embraced them, with positive results.
由于常常出现有效执行的缺失，因而我们实行了一项关于观察认知的计划。
We launched a program of research on observational learning as it typically occurs in the absence of reinforced performance.
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