The length of the lever of bone that the Achilles tendon pulls on also differed, being a quarter shorter in sprinters.
他们还发现，跟腱拉伸时所产生的“杠杆长度”也有差别，短跑运动员的“杠杆长度”要短四分之一。
2
Objective: to observe the effect of alendronate and raloxifene on the lever of biochemical indices, histomorphometry and bone density in the experimental osteoporosis and periodontitis rats models.