1. 规划;策划;构想
    If you formulate something such as a plan or proposal, you invent it, thinking about the details carefully.

    e.g. Little by little, he formulated his plan for escape.
           他一点一点地设计构思出了逃跑的方案。

2. 明确表达;系统阐述
    If you formulate a thought, opinion, or idea, you express it or describe it using particular words.

    e.g. I was impressed by the way he could formulate his ideas.
           他陈述观点的方式让我印象深刻。