1. 明确说明;具体指定
    If you specify something, you give information about what is required or should happen in a certain situation.

specify的解释

    e.g. They specified a spacious entrance hall...
           他们专门指定要一个宽敞的大门厅。
    e.g. He has not specified what action he would like them to take.
           他尚未明确说明自己希望他们采取什么样的行动。

2. 具体说明（或规定）
    If you specify what should happen or be done, you explain it in an exact and detailed way.

specify的意思

    e.g. Each recipe specifies the size of egg to be used...
           每种菜谱都具体规定了所用鸡蛋的大小。
    e.g. One rule specifies that learner drivers must be supervised by adults...
           一条规则明确规定，见习驾驶员必须有成人的监督。