例句與造句

1. The correction of mass fractionation in the measurement of rhenium and osmium isotope ratios by icp - ms
   電感耦合等離子體質(zhì)譜法測(cè)量錸和鋨同位素比值的質(zhì)量分餾校正
2. It's difficult to find osmium isotope in a sentence. 用osmium isotope造句挺難的