(noun.) a protective cover that protects the face of a watch.
(noun.) glassware made of quartz.
(noun.) a crystalline element used as a component in various electronic devices.
(noun.) a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces.
(noun.) a solid formed by the solidification of a chemical and having a highly regular atomic structure.
整理:昆廷
加勒特录入