declivity

英 [dɪ'klɪvɪtɪ] 美[dɪ'klɪvəti]

I looked frontage straightly , going declivity one by one.: 我两眼直视前方,一路下坡又下坡.

He had rolled down a declivity of twelve or fifteen feet.: 他是从十二尺或十五尺高的地方滚下来的.