一个初级训练员必须要学会的困难技能是：有时你必须给狗时间，让它主动作出动作；有些时候你必须允许狗儿犯错误。

One of the harder skills new trainers must learn is that there will be times when you have to allow your dog time to offer behaviors and sometimes you have to allow your dog to make a mistake.

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中国的裁军决策是由中国主动作出的。

Chinas disarmament decision is made out of its own will.

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家教固然能促进学习，学习者自身才起主动作用 。

The tutor is the facilitator of learning, while the learner is active.

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