Diamond是“钻石”，in the rough是“未经打造的”。这个短语是什么意思呢？请看对话：

    A: How do you like the new graduate from the theater school?

    B: She may seem shy and ordinary right now, but give her a couple more years — she truly is a diamond in the rough.

    Note: The phrase is clearly a metaphor for the original unpolished state of diamond gemstones, especially those that have the potential to become high-quality jewels. It is more commonly expressed in the form “rough diamond.” The first recorded use in print is in John Fletcher’s “A Wife for a Month,” 1624: “She is very honest, and will be as hard to cut as a rough diamond.” The term refers to a person who has good qualities despite a rough exterior and a person with great potential.