Pronation is the gentle roll of a foot inward after making contact and it is normal and necessary for a foot to evenly absorb the impact of striking the ground.
脚内翻是脚触地后的稍微内翻，以均匀吸收触地后的冲力，这是一个正常而必要的的动作。
2
A striking difference existed between different pesticides in their contact poisoning and residue toxicity.
农药对家蚕的触杀毒力和残毒期因农药品种不同而有极显著差异。
3
In the numerical calculation, the effects of striking object's initial velocity, and the shells 'geometrical parameters and the point of contact on the dynamic response of shells are discussed.