巩膜前表面有_______和_______覆盖,不与外界直接接触,巩膜病_______发生。巩膜病的临床特点是_______,_______。巩膜病发作症状为_______、_______、_______。
— What would you like to have, meat or fish?
— _____________________.
— ___________________
— Once or twice a week.
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