She is also the author of American Chestnut, a social history of one of America's most common trees.
2
每个单元均由肋木框架构筑而成,框架固定在花旗松高跷上,然后覆以英国栗木。
Each unit is constructed from a ribbed timber frame set upon Douglas fir stilts and then clad in English chestnut shingles.
3
栗嘴巨嘴鸟很大的喙占据了它身体的三分之一长度,但由于其为蜂巢式结构,它并没有看起来那么重。
The giant bill of the chestnut-mandibled toucan makes up a third of the bird's body length, but thanks to a honeycomb structure, it's not as heavy as it looks.