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1.be associated with 与..有关
例句：Foreigners always associate China with the Great Wall.
外国人总是把中国和长城联系在一起。
2.immune system 免疫系统
例句：The patient's immune system would reject the transplanted organ as a foreign object.
病人的免疫系统会对移植器官产生异质排斥反应。
3.food poisoning 食物中毒
例句：He had suffered a serious case of food poisoning over the Christmas holidays.
在圣诞假期里，他经历了一次严重的食物中毒。
4.made from 由..制作
例句：Nylon is made from air, coal and water.
尼龙是由空气、煤和水加工制成。
