This article has analyzed the wounding mechanism of bullets on living aims and the factors affecting the wounding effects and proposed effective ways to improve the wounding capacity.

The target determination is then completed using a "relevant target life cycle" method.

First the essay gives a definition of edugame on line and then discusses how to design edugame on line accepted by students,paterfamilias and teachers,which includes five strategies:quest-based strategy,finite goal strate- gy,competition and cooperation strategy,adapting strategy and function maturity str.