some were doubled up in pain.请帮忙分析下这个句子,

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/12 06:10:48

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Twenty minutes later nearly half the passengers were ill—dramatically ill.Several were moaning and groaning,some were doubled up in pain,and two were unconscious.Fortunately there was a doctor on board,and he was helping the hostesses.He came to the galley and said,'I'd better speak to the captain.This is a severe case of food poisoning.I think we'd better land as soon as possible.' 'What caused it?' asked one of the hostesses.'Well,' replied the doctor,'I had the beef for dinner,and I'm fine.The passengers who chose the fish are ill.' The hostess led him to the flight deck.She tried to open the door.'I think it's jammed,' she said.The doctor helped her to push it open.The captain was lying behind the door.He was unconscious.The co-pilot was slumped across the controls,and the radio operator was trying to revive him.
中级英语听力
有些人蜷缩着身体,疼痛难当.
double up:cause sb bend the body弯腰的意思.

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