To change teaching method and improve teaching quality is the core of PE.

改变教学方法、提高教学质量是体育教学的核心。

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After many years of PE teaching in colleges, as we re-examine the various elements of the physical education, we are trying to find a core element of the reform of PE teaching in colleges.

经过多年高校体育教学，我们在重新审度构成体育课诸要素的同时，努力寻找高校体育教学改革的核心要素。

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The cable core is filled with the filling compound to protect it from water ingress, over which a thin PE inner sheath is applied.

松套管（和填充绳）围绕中心加强芯绞合成紧凑和圆形的缆芯，缆芯内的缝隙充以阻水填充物。

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Mr Draper says PE should be a core part of the new curriculum.

BBC: The challenge of providing good PE lessons