He's a nice old fellow.

他这位老兄人不错。

《牛津词典》

When all was ready, the Rat said, "Now, pitch in, old fellow!"

一切准备就绪，水鼠说：“老伙计，现在动手吧！”

youdao

Sing her 'Turtle Soup', will you, old fellow?

给她唱首《海龟汤》吧，好吗，老伙计？

youdao

The youngest MacArthur fellow is thirty-year-old John Dabiri.

VOA: special.2010.10.01

Among the more than 200 men Sakato and his fellow soldiers helped rescue was Jack Wilson, who is now 85-years-old.

VOA: standard.2009.11.04

"I saw this old fellow whittling, and I set out to accomplish it, " he says.

FORBES: Artists in overalls

By now the old fellow was quite a distance from us, just a speck, really.

FORBES: The Body in the Suitcase: How Our Stories Lead Us Astray

" Adds a 30-year-old fellow runner: "It's very different from what I expected.

CNN: Stops and Starts