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释义	本底消除 background eradication
随便看	Parachute Infantry Battalion Parachute Infantry Regiment parachute inspection control parachute into parachute jump parachute jumper parachute jumpers parachute-opening device parachute opening shock parachute-opening shock parachute jumping Parachute Jumping Exercise parachute jumping instructor parachute jumping tower parachute kids parachute kite parachute landing parachute landing area Parachute Landing Fall parachute landing force parachute lanyard parachute lap pack parachuteless parachute life boat Parachute Light Regiment