1. Water is an example of an uncountable substance.
水是一个不可数的物质的例子。

2. The concept of time is often described as uncountable.
时间的概念通常被描述为不可数的。

3. Happiness is something that is uncountable and cannot be measured in quantity.
幸福是一种不可计量的，无法用数量来衡量的东西。