sapping

n.

a watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant

a person who lacks good judgment

同义词：foolsapheadmugginstomfool

a piece of metal covered by leather with a flexible handle; used for hitting people

同义词：blackjackcosh

Groundwater Sapping and Valley Formation on Mars
Piping/Sapping Erosion. II: Identification‐Diagnosis
Sapping processes and the development of theatre-headed valleys.
Spring sapping on the lower continental slope, offshore New Jersey
Chapter 11. Spring sapping and valley network development
Groundwater-sapping origin for the giant quebradas of northern Chile
Drainage Systems Developed by Sapping on Earth and Mars
Sapping processes and the development of theater-headed valley networks on the Colorado Plateau
Morphology of large valleys on Hawaii: Evidence for groundwater sapping and comparisons with Martian valleys
Valley formation in Margaritifer Sinus, Mars, by precipitation-recharged ground-water sapping