肌阵挛肌肉和部分肌肉的急速抽动,它没有任何节律或方式,存在于各种脑失调症 A sudden twitching of muscles or parts of muscles, without any rhythm or pattern, occurring in various brain disorders.
我以为那只老鼠死了,这时候它却微微地抽动了一下。 I thought the mouse was dead, but then it gave a slight twitch.
那狗一闻到肉味,鼻子直抽动。 The dog's nose twitched as it smelt the meat.