Primary data can be collected in four ways; observation, focus groups, surveys and experiment.
收集初级资料的方法有四种：观察、专题讨论、问卷调查和实验。
Methods Forty rabbits were involved in this experiment. Animal model of right femur comminuted fracture was made and randomly divided into four groups.
方法制造兔右股骨粉碎性骨折的动物模型，a组用异体脱钙骨基质颗粒复合骨水泥并表面贴附自体骨渣进行修复；
Discuss in groups of four and finish the experiment report.
小组讨论并完成实验报告。
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