áp lực không khí 
atmospheric pressure [ áp ] : (1) to press (up to, against), place against, approach, get close; (2) to detain; (3) to pawn
[ lực ] : force, energy, strength, ability
[ không ] : (1) no, not; (question tag); (2) air; (3) empty
[ khí ] : air; instrument, utensil, vessel
Most Common Compounds Set 1:
Most Common Compounds Set 2 :