make explanations efficient and concise
...Make explanations efficient and concise; choose examples for their power in the subject.要进行简单而有效的讲解，要选择好例子。 Provide and manage materials for an exemplar activity.
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make explanations efficient and concise
使解释有效而简洁
以上为机器翻译结果，长、整句建议使用 人工翻译 。