knuckle under

v.

屈服；屈膝投降；

Buckling of sharp knuckle torispheres under external pressure
Bolivia's next challenge to globalization: presidency hangs in the balance as the country refuses to knuckle under to big oil
Sharon To Knuckle Under?
Wakefield Makes a's Knuckle under 4-1
Strength of the Large End of a Cone-Cylinder Junction with Knuckle under Internal Pressure
He didn't knuckle under
Kinematic control of redundant knuckle Booms with Path Tracking under Geometric, Velocity and Acceleration Constraints
Haeger's hopes just may knuckle under A's 5, Sox 3
New pitcher Barnes won't knuckle under.(Sports)
EARLY BOARDERS DIDN'T KNUCKLE UNDER.(News)