This piece of selenite is so freaking heavy and so big.

这块又重又大。

Quantum dots are usually made from semiconductor materials, such as graphene, selenite or metal sulfides, Pecourt says.

Pecourt 表示，量子点通常由半导体材料制成，例如石墨、属硫化物。

The selenite waxed and waned with the moon, and the meloceus, that discovers thieves, could be affected only by the blood of kids.

随着月亮的变化而消长，而发现小偷的梅洛西斯只能受到孩子们的血液的影响。