positron annihilation life time spectrum的用法和樣例：
例句
- The vacancy defects of samples were measured by slow positron annihilation.
借助慢正電子湮沒(méi)技術(shù)研究了樣品的空位型缺陷。 - The PAT experiments showed that the mean life and vacancy defects increased with the increasing anodization time.
正電子湮沒(méi)實(shí)驗表明，隨著(zhù)陽(yáng)極氧化時(shí)間的延長(cháng)，平均壽命值增大，空位缺陷增多。
