+8 = 16 

ㄌㄞˊlái

  1. (rhenium,Re)​化學元素原子序75。金屬元素過渡元素自然界含量分散鎔點攝氏一百八十度高溫腐蝕良好機械性能電阻用來製造電燈燈絲人造衛星火箭外殼

rhenium (chemistry)​
rhénium
Rhenium (Element 75, Re)​ (S, Chem)​