Foothold

来自Big Physics
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wiktionary

ref 

foot +‎  hold


etymonline

ref

foothold (n.)

1620s, from foot (n.) + hold (n.). Figurative use by 1650s; "that which sustains the feet firmly," hence "stable ground from which to act."

取自“https://www.bigphysics.org/index.php?title=Foothold&oldid=33482”