n.[医]抽搐，大笑，震动，动乱
A sudden convulsion shook him, and he fell to the ground.
一阵突然的痉挛使他全身发抖, 摔倒在地上.
The child's nervous illness often threw her into convulsion.
这孩子的神经性疾病常使她产生痉挛.
The country was in ruin and convulsion.
这个国家没落于动乱之中.
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