常見例句雙語例句Seabuckthorn is a main tree species of conserving soil and water, improving ecological environment on the Loess Plateau, especially its semi-arid loess hilly region.在黃土高原，特別是在黃土丘陵半乾旱區(qū)被作爲(wèi)保持水土、改善生態(tài)環(huán)境的主要樹種。 返回 soil improving tree species