因为玩耍性打斗包括速度和强度的变化，以及与自我设限有关的角色快速转换。
Since play fighting includes variations in speed and intensity, and quick role reversals involved with self-handicapping.
在为自我辩护提供证据时，萨瓦跟陪审团讲了他学到的计算过氧化氢强度的方法。
Giving evidence to the jury in his own defence, Sarwar told them of a method he had learned to calculate the strength of hydrogen peroxide.
目的：研究不同锻炼项目、强度和时间对大学生焦虑、抑郁及自我概念的影响。
AIM: To study the effects of different physical exercise item, intensity and time on anxiety, depression and self concept of college students.
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