The body is trying to fight off a disease that is spreading , and as it does so , the body convulses , settles for a time and then convulses again .

身体正试图同正在扩散的疾病作斗争，当这种疾病扩散时，身体在抽搐，解决一段时期以后再次抽搐。

For a spirit seizes him and he suddenly screams and it convulses him until he foams at the mouth ; it releases him only with difficulty , wearing him out .

魔鬼一抓住他，便使他突然狂叫，使他痉挛至于吐沫，叫他筋疲力尽了，还是不肯离开他。