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来源:雅诚德英语网
Each study had collected walking speed measurements and survival rates dating back between six and 21 years.
每项研究统计了6年和21年间的步速测量和生存率。
Each study had collected walking speed measurements and survival rates dating back between six and 21 years.
每项研究统计了6年和21年间的步速测量和生存率。