1. In the past, universities were interchangeable, and most students chose one close to home. 过去，大学是可以互换的，大多数学生选择了一个离家近。
2. Einstein claimed that matter and energy are interchangeable, so that there is no "absolute"time and space. 爱因斯坦宣称，物质与能量是可以互相转化的，因此，没有“绝对的”时间和空间。
3. Note: The seats and springs of the first and second check modules are not interchangeable. The heavier spring and smaller diameter seat belong with the first check module. 注：第一和第二止回阀模块的阀座和弹簧是不可互换的。较重的弹簧和较小直径的阀座属于第一止回阀模块。
英英解释
adj.
1. (mathematics, logic) such that the arguments or roles can be interchanged
2. capable of replacing or changing places with something else; permitting mutual substitution without
