silence为什么加the

加the表示特指，例如：

1.Hugh broke the silence. 'Is she always late?' he asked.休打破了沉默，问道：“她总是迟到吗？”

2.The silence from Alex had hurt and bewildered her.亚历克斯的沉默伤害了她，让她不知所措。

3.The silence lengthened as Thorne unnecessarily shuffled some papers.索恩整理着一些本无须整理的文件，沉默还在延续。