Low B12 levels give rise to elevated homocysteine levels with an associated increased risk of many illnesses, including stroke and heart disease, without any classical B12 deficiency symptoms.
B12水平低引起同型半胱氨酸水平升高与许多疾病有关，包括中风和心脏病风险的增加，没有任何标准的B12缺乏症状。
Our findings are striking in that they show that these neighborhood factors can predict underlying heart disease in people without symptoms, as early as middle age.
我们的发现在显示这些地区因素可以预测早在中年时期人们没有症状的潜在心脏病方面是引人注目的。
Relieving or soothing the symptoms of a disease or disorder without effecting a cure.
治标的，不治本的用以减缓疾病或小病的征兆的，不受影响治疗。
One, known as SH virus, is present in the blood of many individuals without producing symptoms of disease.
有一种所谓SH病毒(血清性肝炎病毒)，存在于许多人的血液中而不引起症状。
Additionally, many schoolchildren continue to harbour malaria parasites without displaying any symptoms of disease.
另外，许多学龄儿童身上虽有疟原虫寄生却没有任何症状。
Overall, subjects with an underactive thyroid without symptoms, also referred to as subclinical hypothyroidism, had a 65 percent increased risk of coronary heart disease.
总体上，没有甲状腺功能减低症状的个体，也被称为亚临床甲减，发生冠心病的风险增加65%。
An individual infected with pathogenic microorganisms without showing symptoms of disease.
一种感染了病原微生物的个体但并未表现出染病的症状。
Conclusion Circulatory acute intestinal obstruction is an uncommon disease without specific symptoms and signs and is difficult to diagnosis before operation.
结论缺血性肠梗阻少见。临床表现无特异性，术前难以诊断。
Conclusion Circulatory acute intestinal obstruction is an uncommon disease without specific symptoms and signs and is difficult to diagnosis before operation.
结论缺血性肠梗阻少见。临床表现无特异性，术前难以诊断。
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