【英语时差8,16】关于坚果的秘密（在线收听）

 Nuts, botanically speaking, are made up of both the seed itself and a hard outer layer that is the fruit, which does not split open when ripe. Some examples of true nuts are acorns, hazelnuts and chestnuts. Walnuts, pecans and almonds, in contrast, are edible seeds from a bigger fruit. Most of the inedible fruit is removed at harvest so when you buy walnuts and almonds in the shell, you’re buying the seeds enclosed in woody endocarp, which is the remaining layer of the fruit wall. Brazil nuts are also seeds. They come from a capsule like fruit, in which several of the triangular seeds grow inside, arranged like the segments of an orange. Peanuts are the seeds of a legume, or member of the bean family. Pistachios, cashews, macadamias and pine nuts are all seeds rather than nuts.