"formula"是一个名词，用来指代一个数学、科学或其他领域的公式或规则。它还可以用来指代一种配方，比如化妆品或婴儿奶粉的配方。
例句：
- The formula for calculating the area of a circle is πr^2.
- The company has developed a new formula for their laundry detergent.
"formulation"也是一个名词，用来指代一个理论、计划或问题的表达方式或说法。它表示对某个概念或想法的具体描述或组织形式。
例句：
- The government is still working on the formulation of their new economic policies.
- The team spent weeks refining the formulation of their research hypothesis.
