He gave an involuntary smile.
他不由自主地笑了一下。
意识做出
;非故意, 志愿;
, 意识;法管束;;
;,心,意识;
;;He gave an involuntary smile.
他不由自主地笑了一下。
Meg gave an involuntary exclamation.
梅格不由自主地叫了起来。
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
横纹状结构，平滑肌不随
意志收缩，故称不随意肌非横纹肌。
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