S. is only more than 200 seals soldiers in active service, they all master of pen and sword, fitness, because mostly at night, for the eyesight requirements as fighter pilots.
对外披露的消息是，全美军只有200多名现役海豹突击队战士，他们个个文武双全，体魄强健，因为主要是夜间执行任务，对视力要求不亚于战斗机飞行员。
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