造币用金属板

例句：

1. 1. She bought a new coin for her grandma's birthday.
   她给奶奶的生日买了一枚新硬币。
2. 2. The old coin was worth more than the new one.
   旧硬币比新的值钱。
3. 3. He found a coin in the ground and decided to keep it as a lucky charm.
   他在土里发现了一枚硬币，决定把它当作幸运符保留下来。