And dolphins are very promiscuous, and so we have to determine who the fathers are, so we do paternity tests by collecting fecal material out of the water and extracting DNA.
海豚的交配是很混杂的， 所以我们必须判断谁是海豚爸爸。 亲子鉴定的方法是：先从水中收集排泄物， 然后从中提取DNA。