Since play fighting includes variations in speed and intensity, and quick role reversals involved with self-handicapping.
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。
2
The findings suggest that even a half-hour walk at a quickspeed every day could lower the risk of cognitive impairment.
结果表明，每天快速行走半个小时也可以降低认知障碍的风险。
3
The engineering experience at abroad compared with RCC dam demonstrated that it has low requirement of foundation, quickspeed in construction and low cost.