hai trục chính 
two main powers [ hai ] : two; both
[ trục ] : (1) axis, shaft, Axis (powers in WWII); (2) to expel, force out; (3) to hoist, jack up, lift
[ chính ] : main, principle, chief; self, own; exactly, just, precisely
Most Common Compounds Set 1:
Most Common Compounds Set 2 :