subnormal operator

例句：

1. 1.The patient's blood pressure was subnormal.
   病人的血压低于正常水平。
2. 2. The subnormal temperature caused the baby to shiver.
   低温导致婴儿发抖。
3. 3. The subnormal results were due to a faulty test.
   这些亚正常的结果是由于测试错误导致的。