他不断的打扰是主要的恼人来源。

His constant interruptions were a major source of ___irritation.

持续不断的交通噪音对居民来说是一种持续的烦扰。

The incessant traffic noise is a constant ___irritation to residents.

她试图掩饰自己对一再延误的与日俱增的恼怒。

She tried to hide her growing ___irritation at the repeated delays.