the hilly-gullied loess region的用法和樣例：
例句
- Some suggestions are proposed for loess hilly area of south Ningxia.
為寧夏南部黃土丘陵區生態(tài)恢復提出了幾點(diǎn)建議。 - The cultivation technique of major fine pasture in the semiarid and loess hilly area wasstudied and reviewed in details.
比較詳細地研究總結了半干旱黃土丘陵區主要優(yōu)良牧草的栽培技術(shù)。
