boring

無聊的、乏味的、枯燥的

The lecture was so boring that half the students fell asleep.

那場演講太無聊了，一半的學生都睡著了。

單調的、平淡無趣的

He wears the same boring gray suit to every meeting.

他每次開會都穿同一套單調的灰色西裝。

鑽孔、鑽探專業用語

The boring of the tunnel took nearly three years to finish.

這條隧道的鑽掘工程花了將近三年才完成。