长时间的电脑工作会让人感到很枯燥。

cháng shíjiān de diànnǎo gōngzuò huì ràng rén gǎndào hěn kūzào.

Prolonged computer work can make people feel very dull.

这堂课讲得太枯燥，同学们纷纷打瞌睡。

zhè táng kè jiǎng de tài kūzào, tóngxué men fēnfēn dǎ kèsuì.

The lecture was too dull, and many students nodded off.

如果只是死记硬背，学习汉字会变得很枯燥。

Rúguǒ zhǐshì sǐjìyìngbèi, xuéxí Hànzì huì biàn de hěn kūzào.

If you only memorize mechanically, learning Chinese characters will become very boring.