This section trod the chair to adopt the unique spring replacement system steadily, might the more convenient change difficulty of movement, effective protection of equipment.

此款稳踏椅采取了独特的弹簧更换系统，可以更便捷的改变动作难度，同时也有效的保护了器材。

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Severe burns can result in the formation of scars or keloids that are bad looking. They can even lead to joint contracture, joint deformity and difficulty in movement.

因烧伤而造成的疤痕和结疤增生可能会影响仪容，甚至会使到关节挛缩、畸型及活动困难。

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Male is stronger than female athlete about take off of explosive effort in difficulty movement.

难度动作的起跳动作，男选手比女选手的爆发力强。

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The difficulty starts out on the incredibly easy side and quickly gets more challenging as new hazards and movement techniques are introduced.

FORBES: Cling!: Of Pegs And Platformers