a diacritical mark (two dots) placed over a vowel in German to indicate a change in sound
例句
Conclusion The hyponatremia patients can use hemodialysis when dieresis had no effect, combine heart failure or hypervolemia. 结论低钠血症患者如果利尿效果不佳或合并有心力衰竭或高血容量时,可以考虑血液透析治疗。
