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，平滑肌不随人的意志收缩，故称不随意肌非横纹肌。
He now faces two charges of involuntary manslaughter.
他现在面临两项过失杀人罪的指控。
假如有如果
Luckily, coughing is an involuntary reflex, just like blinking.
庆幸的是，咳嗽是个无意识的反射动作，就像眨眼。
VOA词汇精讲
Playing dead is an involuntary reaction to a threat.
装死是动物们在面对威胁时，身体的一种不自主的反应行为。
八十天环游地球
Passepartout, the involuntary cause of this delay, was desperate.
这都是路路通无意之间造成的，因此路路通感到非常失望。
科学洞察双语版
Many of those involuntary actions are mysterious, annoying, just plain weird.
许多不自觉的行为都是难以解释的、烦人的、很奇怪的。
逍遥法外 第三季
Three years. You just need to plead guilty to involuntary manslaughter.
三年，你只需认下过失杀人罪。
The school of life
Singledom is framed as an involuntary, depressing and always hopefully temporary state.
单身被认为是一种非自愿的、令人沮丧的、总是希望是暂时的状态。
英语百科
Involuntary
Involuntary is the antonym of voluntary. An involuntary action is one that occurs without volition or will; see volition (psychology) and will (philosophy). Involuntary may also refer to: