《英汉医学词典》fragile X chromosome mental retardation syndrome 脆性X染色体智力障碍综合征 fragile x mental retardation: 脆性x智力低下; 脆性x综合征fragile x-associated mental retardation: 脆性x连锁智力低下fragile x chromosome syndrome: 脆性x染色体综合征fragile x chromosome: 脆x染色体; 脆X染色体; 脆染色体; 脆性x染色体marfanoid mental retardation syndrome: marfan样智力迟钝综合征下载手机词典可随时随地查词查翻译