forest trees短语⁷⁹⁹⁷⁸⁺⁹ 基本例句 林木 Hailed as an early American environmentalist, Thoreau wrote essays on autumnal foliage, the succession of forest trees, and the dispersal of seeds, collected in Excursions. 梭罗被拥戴为一名早期的美国环境保护论者,他撰写有关秋天的树叶、林木演替、种子传播的随笔,并被收录在《远足》中。 yuloo