各种骨骼的形状和结构也必须加以调整，以使肌肉在直立行走时能够执行这些功能。
The shape and configuration of various bones must likewise be modified to allow the muscles to perform these functions in upright walking.
章鱼的肌肉系统使它能够非常灵活地做出各种形状和姿势。
The muscular system of the octopus enables it to be very flexible to assume all sorts of shapes and postures.
这种控制晶体形状的调焦肌肉(睫状肌)，长期处于收缩状态。
The focusing muscle (ciliary muscle), which controls the shape of the lens, is thus in a constant state of contraction.
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