She made her meaning crystal clear.
她把她的意思解释得清清楚楚。
I lost my crystal necklace at the party.
我在晚会上丢失了水晶项链。
A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal.
水合物结晶中有一定比例水分子成分的固体化合物，其中水分子与晶体的含量为一固定比例
