diamond

• 由纯碳组成的透明无色晶体，是已知最硬的天然物质，被视为珍贵宝石，也用于切割和研磨工具。

A precious stone consisting of a clear and typically colorless crystalline form of pure carbon, the hardest naturally occurring substance, valued as a gem and used in cutting tools.

1. Precious gemstoneA2formal

   A very hard, transparent, and valuable stone made of carbon, often used in jewelry.

   钻石

   • She received a diamond ring for her engagement.
   • The crown is decorated with diamonds and rubies.
   • Diamonds are one of the hardest natural materials on Earth.

   同义词brilliantgemicejewelrockstone

2. A2formal

   A shape with four equal sides that is like a square that has been turned so that its corners point up and down.

   菱形

   • The quilt was decorated with diamond patterns.
   • He drew a diamond on the paper.
   • The sign had a yellow diamond shape.

   同义词lozengerhombrhombus

3. Baseball fieldB1informalamerican

   The playing field in baseball, especially the area inside the four bases.

   棒球场

   • The batter hit the ball deep into the diamond.
   • The players ran across the diamond to score a run.
   • The coach stood in the middle of the diamond.

   同义词ballparkbaseball fieldfieldinfield

4. Playing card suitA2formal

   One of the four suits in a deck of playing cards, marked with a red diamond shape.

   方块

   • She played the ace of diamonds.
   • He had a hand full of diamonds.
   • The queen of diamonds was the winning card.