1. The equivalencies between the two currencies were constantly changing.
这两种货币之间的等价关系不断变化。

2. The teacher explained the equivalencies between fractions and decimals.
老师解释了分数和小数之间的等价关系。

3. The student had to study the equivalencies between different units of measurement.
学生必须学习不同测量单位之间的等价关系。

4. The equivalencies in the trade agreement were carefully negotiated.
贸易协定中的等价关系经过了精心谈判。

5. The company had to determine the equivalencies between its products and those of its competitors.
公司必须确定其产品与竞争对手产品之间的等价关系。

6. It is important to understand the equivalencies between different educational systems.
了解不同教育体系之间的等价关系是很重要的。