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бързина́ form.
environ.	速度 (人体迁徙率的标量度量法，或是作为对行驶的距离除以所花时间(平均速度)，或是对于时间而言的相对一个特定点的位置改变率(瞬时速度)。它是以米每秒，英里每小时等指标来衡量。)