gentle hill的用法和樣例：
例句
- On the gentle slope near the city of Soochow, the weeds were tall.
蘇州城外一面並不很陡的山坡上，雜草叢生。 - We had to go down with great care, as the hill was so steep.
我們不得不小心翼翼地下山，因為山坡很陡。 - The foothills began as gentle rolls in the plain.
大平原上起初地勢偶爾有些平緩的起伏。 - The narrow road is on a gentle slope which occasionally makes sharp twists.
這條狹路是在一個平緩的斜坡上，它有時曲折得很厲害。
