1.准备动作;预热
1.温血的
1.warm-blooded animals have a body that stays warm in both hot and cold environments. A cold-blooded animal has a body temperature that changes when their environment changes.
1.The presence of fecal coliform bacteria indicates that the water has been contaminated by feces of humans or other warmblooded animals.
粪便大肠型细菌的出现表明水已经被人类或其他热血动物的粪便所污染。