相关单词同义词slope, pitch, 近义词 descent 下降, fall 落下, downslope 下坡, declension 语尾变化, declination 倾斜, decline 下降反义词acclivity, 向上的陡坡临近词Dec, Decini相似词declassify, declension, declination, decline, declutter, decoction, decode, decoder, 返回 declivity