3.病症，症状，可数当做可数名词的时候，指多个时用复数，单个时用单数，critical/stable/satisfactory condition One of the victims was in a
so far a serious of problems 后用单数还是复数
3.病症，症状，可数当做可数名词的时候，指多个时用复数，单个时用单数，critical/stable/satisfactory condition One of the victims was in a