Try as much as possible to run on a level surface, or at the very least give each leg equal time as "the shortleg."
尽量在平整的路上跑步，或者至少要让你的两条腿变短的机会相同。
2
Running on a road that is banked at the sides, for example, effectively gives you one shortleg, causing it to pronate and put pressure on the knee.
跑步膝同时会因为在不平整的路上跑引发，比如可能会让你一脚长一脚短，在膝盖上施加压力。
3
Precise time integration method is applied in short-leg shear wall, and a new scheme is put forward which is referred as Newmark-precision time history method.