例句與造句

1. The level of chromium isotope 54 Cr in 謘terplana 065 is similar to those in ordinary chondrites, while oxygen isotopes are similar to those in some rare primitive achondrites . 謘terplana 065 also features a chromium-spinel rutile assemblage, not observed in other meteorites.
2. It's difficult to find chromium isotopes in a sentence. 用chromium isotopes造句挺難的