Probe the kids to know the taper, hold its features and understand its plan.

使学生认识圆锥，掌握圆锥的特征，会看圆锥的平面图。

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They do not understand the plan, its impetus, and the beneficial effects on public health.

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Our regular clients understand this dynamic and have been able to plan accordingly to minimize its impact on their businesses.

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Chinese and World Health Organization officials said Wednesday in Beijing that they plan to boost surveillance and research on the H7N9 virus to understand its spread and potential for human-to-human transmission.

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