约束性可以用英语表示为 "constraint"。这个词源于拉丁文 "constrictus"，意思是"收缩"、"束缚"。
例句：
Time is a constraint that we all have to deal with. (时间是我们都必须应对的约束。)
The budget is a major constraint on what we can do. (预算是我们能做什么的主要约束。)
The physical constraints of the space made it difficult to design the layout. (空间的物理约束使得设计布局很困难。)
例句：
Time is a constraint that we all have to deal with. (时间是我们都必须应对的约束。)
The budget is a major constraint on what we can do. (预算是我们能做什么的主要约束。)
The physical constraints of the space made it difficult to design the layout. (空间的物理约束使得设计布局很困难。)