The fact that all the people with food poisoning ate tuna salad sandwiches pointed to contaminated mayonnaise as the source of the illness.
The fact that all the people with food poisoning ate tuna salad sandwiches pointed to contaminated mayonnaise as the source of the illness.
（所有食物中毒的人都吃了鲔鱼沙拉三明治，这个事实显示被污染的美乃滋是病源。）