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.
只有由睫状肌收缩，短暂的近调焦使远距离得到松弛。
It wants to be relaxed for distance, with the ciliary muscle contracting only for brief periods of close focusing.
观众时而为这只小猪笑得前仰后合，时而又不禁为它质朴乐观的个性而泪盈于睫。
While the audience laugh their heads off, they also can`t help getting a bit tearful over the unsophisticated but upbeat piggy.
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