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physical accidental serious environmental
small accidental significant timely
physical accidental serious environmental
a; an the; an the; the a; the
accidental accident by accident with accident
accidental aggressive contradictory controversial
up at up to up with up on
physical accidental serious environmental
open circuit short circuit polarized ground ground reference point
turned over turned about turned out turned off
the master the chief engineer the owner of the ship the manager who assumes the responsibility for operation of the ship
accident accidental in accident by accident
correct accidental direct punctual
physical accidental serious environmental
physical accidental serious enviromental
lessons textbooks programmes grounds