I was supposed to be writing a letter but I'm afraid I got sidetracked.

我本来应该在写信，但后来恐怕是分心干别的去了。

《牛津词典》

A few days later, it look liked I got sidetracked by the idea of undertaking this polyphasic sleep experiment.

经过这些天的体验，我相信我已经大致了解了多相睡眠。

youdao

I was looking up American history in the encyclopedia when I got sidetracked by a fascinating article on chess.

我在百科全书中查找美国历史方面资料的时候，却被另外一篇有关象棋方面的文章吸引住了。

youdao