词典释义：
n.（英国皇家）空军上士
"We're here because this is where the real UAV capability is," the flight sergeant from Darlington, England, said.
“我们来这里学习，是因为这里才是真正具备使用无人飞机能力的地方，”来自英国Darlington的飞行员上士说。
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