我们需要评估这个方案的适用性，看看它是否适合我们的项目。

We need to evaluate the ___applicability of this plan to see if it suits our project.

这个新教学方法的适用性将在不同年龄段的学生中进行测试。

The ___applicability of this new teaching method will be tested among students of different age groups.