He gave an involuntary smile.
他不由自主地笑了一
。
做出的;非故的的;法管束的;
的;的,心的,的;He gave an involuntary smile.
他不由自主地笑了一。
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
察，平滑肌
横纹状结构，平滑肌不随人的
志收缩，故称不随肌非横纹肌。
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