目前使用的两种抽样的基本方法是概率抽样和非概率抽样。
The two basic sampling methods in use today are probabilistic and non_probabilistic sampling.
重要的是，这个研究完成样本小，非随机抽样，并且不是广义的或者建议可以预防受伤的项目。
It is important to note that this study was completed on a small, non-randomized sample, and may not be generalized or suggest this program can prevent injury.
通过问卷调查和作文抽样分析，说明整体语言教学有助于培养非英语专业学生的综合英语能力。
By a questionnaire and sample compositions survey, this paper shows that Whole Language Teaching Approach will help improve the English proficiency of non-English major students.
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