They give airpirates an edge that officials are finding increasingly difficult to counter .
他们给那些空中强盗一定的优势，使得机场官员越来越感到难以对付。
2
Several pirates appeared on deck and moved up to the bow with their hands in the air in surrender.
随后几个海盗出现在甲板上，双手举起表示投降。
3
A citadel needs to be strong enough to withstand the pirates' determined assaults and to have emergency rations and air conditioning, so that the crew can stay safe for at least 24 hours.