The focusing muscle (ciliary muscle), which controls the shape of the lens, is thus in a constant state of contraction.
这种控制晶体形状的调焦肌肉(睫状肌)，长期处于收缩状态。
Such a feeling may be compounded by general fatigue, including a lack of sleep, or by specific muscle overuse related to long hours of focusing on, say, a computer monitor.
引起这种感觉的疲劳因素有很多种，包括睡眠缺乏，或者长时间注视一个地方，如电脑显示器，导致的部分肌肉过度使用。
It wants to be relaxed for distance, with the ciliary muscle contracting only for brief periods of close focusing.
只有由睫状肌收缩，短暂的近调焦使远距离得到松弛。
A concentrated 30 minute massages focusing on the back, Neck and shoulder,. Special massage techniques are used to relax and reduce muscle tension.
对背部，颈部及肩膀集中按摩30分钟。特殊的按摩技术，以放松和减轻肌肉紧张度。
The exercise therapy group received a home program focusing on pain contingent training of back, abdominal, and leg muscle functional strength and endurance, stretching, and cardiovascular fitness.
锻炼疗法组接受家庭治疗方案，针对背部、腹部和腿部肌肉力量和耐力，伸展，和心血管健康锻炼所致的疼痛。
Muscle: Contractile tissue that produces motion for functions, including body movements, digestion, focusing, circulation, and body warmth.
肌肉：可收缩的肌肉，产生的运动功能如身体动作、消化、聚焦、循环及身体保暖。
Muscle: Contractile tissue that produces motion for functions, including body movements, digestion, focusing, circulation, and body warmth.
肌肉：可收缩的肌肉，产生的运动功能如身体动作、消化、聚焦、循环及身体保暖。
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