“坡度”怎么读

有两个超过13,000英尺的山口，但坡度平缓。There were two passes over 13,000 feet but the slopes were gentle.一连串坡度很大的小山耗尽了骑车人的气力.The series of steep hills sapped the cyclists'strength.我们越往前走,坡度越大.The dip increased as we went on....

“坡度”的英语可以翻译为：falling gradient，slope，inclination，declivity，grade ...