hafnium例句
And how is it known that Mars had
hafnium - 187 ?
那么是如何知道火星有铪 -187 的 呢 ?
This activator is acyl amine - the
hafnium activator that ether is a foundation.
该催化剂为酰胺 - 醚为基础的铪催化剂.
Chemical form of
hafnium is perchlorate or nitrate.
铪的化学形态为过氯酸盐或硝酸盐.