This paper analyses the density of exercise and the load of sports in the course of PE teaching in Tong Jiaqiao Middle school by applying the information and the method of comparative analysis.

运用文献资料和比较分析等方法，调查分析了重庆童家桥中学教学过程中的体育课练习密度和运动负荷。

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It shows using quantitative exercise load and strengthening density and time of exercise can help college students master movements and have an active effect for study.

实验结果表明，采用定量练习负荷，加强练习的密度与练习时间，对学习效果产生积极影响，有助于学生掌握动作。

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With increase in electronic package density, the reliability of a board-level package under drop impact load becomes a key issue.

随着微电子封装密度的提高，板级封装在跌落冲击载荷下的可靠性成为人们关注的焦点。

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Manhattan supports its density only by being surrounded by a broader load of crud.

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For example, the density of wood in a palm tree trunk varies, depending on the load it must support.

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