double-word boundary

例句：

1. 1. The sentencestructure is a double-word boundary thatseparates the subject and predicate.
   句子结构是一个双词边界，将主语和谓语分开。
2. 2. In programming,a double-word boundary is used toindicate a function call or a block ofcode.
   在编程中，双词边界用于指示函数调用或代码块。
3. 3. The double-word boundary helps to prevent accidentalmodification of variables during debugging.
   双词边界有助于在调试过程中防止意外修改变量。