据估计，至少30%的老年人住房低于标准。更多的人为了修缮住房，只得牺牲一些必需品。
【正确答案】：
IT HAS BEEN ESTIMATED THAT AT LEAST 30 PERCENT OF THE ELDERLY LIVE IN SUBSTANDARD HOUSING. MANY MORE MUST DEPRIVE THEMSELVES OF ESSENTIALS TO KEEP THEIR HOMES IN REPAIR. 
【题目解析】：考点：estimated：估计，评估； substandard： 不合规格的，标准以下的；deprive：剥夺，使丧失； essentials：必需品。句子结构：It has been estimated that是固定句型，用被动语态；第二句中to keep是不定式做目的状语。