Apples, along with cherries, peaches, and almonds, are members of the rose family.
苹果，樱桃，桃子和杏仁都是玫瑰科。
The seeds of apples and these other fruits contain natural chemicals that are toxic to some animals.
苹果和这些水果的种子，都含有对某些动物有毒的天然化学物质。
Are they poisonous to humans?
它们对人类有毒吗？
Apple seeds do contain a small amount of cyanide, which is a lethal poison, but you are protected from the toxin by the hard seed coating.
苹果种子确实含有少量的氰化物，这是一种致命的毒物，但种子外面坚硬的涂层可以保护您免受毒素的伤害。
If you eat whole apple seeds, they pass through your digestive system relatively untouched.
如果你直接咽下整颗苹果籽，它会直接通过你的消化系统，没有直接接触毒素。
If you chew the seeds thoroughly, you will be exposed to the chemicals inside the seeds, but the dose of toxins in an apple is small enough that your body can easily detoxify it.
如果你彻底咀嚼苹果籽，你会接触到种子内部的化学物质，但是因为苹果籽中的毒素剂量很小，你的身体很容易将毒素排除干净。
By body weight, about 6 milligrams of cyanides can kill a person weighs 60 kilograms.
按人的体重计算，约6毫克氰化物剂就可以毒死一个60公斤重的人。
A person weighing 70 kilograms would need to eat 143 seeds to reach the lethal dose. That's about 18 whole apples.
一个体重70公斤的人需要吃143粒苹果籽才能达到致命剂量。 那大概需要18个完整的苹果。