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。
In general, warm up by focusing first on large muscle groups, such as your hamstrings.
通常，热身首先注重在在大的肌肉群，例如你的大腿。
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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