顶部[dǐng bù]
top; upper apex; top half; headpiece; roof; ridge; meplat (弹丸的)
1. Apex:内耳的构造相当复杂深奥,简言之,不同频率的声波在充满淋巴液的耳蜗中进行,引起了基底膜(basilar membrane)不同位置的位移,卵圆窗附近的基底膜对高频敏感,而越往耳蜗顶部(apex)则对低频敏感,这个位移被毛细胞(hair cells)感
2. noun:The top few steps of the ladder were broken. : 楼梯顶端的梯子坏了. | 3. noun 顶部;覆盖物;盖子;尤指盖;顶盖 | a box top : 盒盖