When viewed from a microscope, there is no striation presented in the muscle, and moreover, since it is no controlled by our willpower, it is called involuntary, nonstriated muscle.
从纤维镜下观察，平滑肌无横纹状结构，平滑肌
意志收缩，
称意肌
横纹肌。
;
意, 志愿;, 无意识;;;
;
是意,无心,无意识;
;受抑制;When viewed from a microscope, there is no striation presented in the muscle, and moreover, since it is no controlled by our willpower, it is called involuntary, nonstriated muscle.
从纤维镜下观察，平滑肌无横纹状结构，平滑肌意志收缩，称意肌横纹肌。
He gave an involuntary smile.
他由自主地笑了一下。
Meg gave an involuntary exclamation.
梅格由自主地叫了起来。
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