To set the soft lighting at night to address the elderly poor eyesight, get up in the night to urinate more frequently and so on, to ensure safety.
夜间要设置柔和的照明，解决老年人视力不佳，起夜较勤等问题，确保安全。
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。
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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