This is referred to as isolated systolic hypertension or isolated diastolic hypertension.

这被称为单纯收缩期高压或者单纯舒张期高压。

Sometimes, you can have systolic or diastolic hypertension, when one number is normal and the other is really high.

有时会出现收缩期或者舒张期高血压，即一边的数值很高，但是另一个却处于正常值范围。