In the teaching and training of shot-putting skill a timely discovery and correction of wrong actions are of vital importance for beginners to learn to acquire correct skills.
在推铅球技术教学中，及时发现和纠正错误动作，对初学者学习掌握正确的技术是非常必要的。
2
Literature research and experimental method were adopted to examine the model of shot-putting technique with back shift and the selection of model based on the characteristics of teaching object.
In principle, by putting a set of entangled qubits into a suitably tuned magnetic field, the optimal solution to a given NP-complete problem can be found in one shot.