He says that brain change is strongest when a) you are interested in and like what you are learning, b) you are in control of what you learn and c) you get challenging tasks that make you think hard.
他说，当你 a）对你正在学习的东西感兴趣并且喜欢它，b）你能控制你所学的东西，c）你接受有挑战性、让你努力思考的任务时，大脑的变化是最剧烈的。
C. document the change in the change control plan.
在变更控制计划内记录变更。
It's a very practical attempt adopting wholly new control method change the special power afforded by the A. C. arc welder to the controlled D. C. power required in automobile maintenance.
采用一种全新的控制方法，将交流弧焊器所提供的特种电源转换成汽车修理所需的可控直流电源，是一种具有实用价值的尝试。
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