pesky

The pesky mosquitoes were buzzing around all night, making it hard to sleep.

那些讨厌的蚊子整晚都在嗡嗡作响，让人难以入睡。

I'm always dealing with pesky pop-up ads on my computer.

我总是得处理电脑上那些烦人的弹出广告。

That pesky little glitch slowed down my work progress all morning.

那个烦人的小故障让我的工作进度整个早上都变慢了。