It's normal to feel tired after such a long trip.

这样长途旅行之后感到疲劳是正常的。

《牛津词典》

They may feel tired, and though outwardly calm, can be irritable.

他们可能觉得累，所以尽管表面上平静，却可能容易发怒。

《柯林斯英汉双解大词典》

After a long run, you may feel like you're in pain, you may feel tired.

长跑后，你可能会感到疼痛，你可能会感到疲惫。

youdao

Sleep apnea not only reduces sleep quality and makes people feel tired during the day.

VOA: special.2011.05.04

He or she may begin to feel tired.

VOA: special.2010.02.02

This can make the traveler feel tired.

VOA: special.2009.07.14

You may feel tired and need extra rest the first few weeks after surgery.

CNN: Mastectomy: Surgery to treat or prevent breast cancer

"You need enough sleep to wake up and not feel tired and fatigued the next morning, " he says.

WSJ: When It's Worth It to Skip a Workout and Sleep

In the brain, adenosine builds up throughout the day, ultimately making us feel tired by the end of it.

FORBES: A Snapshot of Caffeine's Fascinating Effects On The Brain