undersurface

n.

下面，底面；

adj.

水面下的；

1. He imagined the ship dangling upside down on the undersurface of the Earth, the giant fingers of gravity holding them firmly in place.
   他想象着飞船吊在地球下面上下晃荡，巨大的引力手指把他们紧紧地抓在这个地方。

Computer attachable to an undersurface of a desk
Security container for mounting to an undersurface
Postauricular undersurface tympanic membrane grafting: A follow‐up report
Tibial insert undersurface as a contributing source of polyethylene wear debris.
Undersurface tear of the ulnar collateral ligament in baseball players. A newly recognized lesion
Contact geometry at the undersurface of the acromion with and without a rotator cuff tear * **
Security box assembly adapted to be mounted beneath an undersurface
Tympanic membrane grafting with fascia: Overlay vs. undersurface technique
MR arthrography of partial thickness tears of the undersurface of the rotator cuff: an arthroscopic correlation.
Backscattered electron imaging of the undersurface of resin‐embedded cells by field‐emission scanning electron microscopy