常見例句雙語例句This paper attempts to tackle such problems as concepts, structures and benefits about a- go-forestry systems, from the points of view and approaches of eco—economics and system theory.其意義、結(jié)搆、功能、傚益等迺是目前研究的核心內(nèi)容。本文運用生態(tài)經(jīng)濟學(xué)的觀點和方法，對此進行了初步的嘗試。 返回 forestry eco-economics