Those fine wine glasses are made of crystal.那些漂亮的酒杯是用水晶做的。
Salt forms crystals.盐会结晶。
It is snow and ice crystals.这是雪和冰的结晶体。

用作定语
▲～+n.
She wears a crystal ornament on her chest.她的前胸戴了一个水晶饰品。
It was filled with the calls of wild birds and the crystal sound of running water in the ravine.在深谷里到处是野禽鸣叫声和清脆的潺潺流水声。
It used to be a crystal stream.那曾是条清澈见底的小溪。
It is crystal clear what we must do.我们该做什么是很明显的。

［词源］＜古英语cristalla(结冰,水晶体)