这枚两克拉的蓝宝石戒指是她最珍贵的首饰。

Her most treasured piece of jewelry is a ___two-carat sapphire ring.

她送的那条项链虽然不贵，但这份两克拉的心意却是无价的。

The necklace she gave me wasn't expensive, but it was a ___two-carat gesture of love.