crystal

1. N-COUNT A crystal is a small piece of a substance that has formed naturally into a regular symmetrical shape. 结晶体

...salt crystals. …盐的结晶体。

...ice crystals. …冰晶。

2. N-VAR Crystal is a transparent rock that is used to make jewellery and ornaments. 水晶

She was wearing a strand of crystal beads. 她戴着一串水晶珠子。

3. N-UNCOUNT Crystal is a high quality glass, usually with patterns cut into its surface. 晶质玻璃

Some of the finest drinking glasses are made from lead crystal. 一些最精致的酒杯是用铅晶质玻璃制成的。