The blobfish is practically all face — a pale, gelatinous deep-sea creature whose large-lipped, sad-sack expression seems to be melting toward the floor.

水滴鱼实际上全身都是一张脸，这种苍白、胶状的深海生物长有大大的嘴唇，忧郁的表情似乎马上就要融化在地板上。

youdao

Are you a little tired of seeing the same sad-sack faces month in and month out?

每个月都看到同样一脸倒霉相的人，有点烦是吧？

youdao

I have no use for the sad sack of a man.

叫他走吧，我不要这个不中用的人。

youdao

Now,it's easy to make fun of Chambord, who was a pauvre type, a sad sack,in many ways.

取笑尚博尔伯爵很容易,在很多方面,他是一个可怜的家伙,是一个冒失鬼

耶鲁公开课 - 1871年后的法国课程节选

And the unfortunate thing is that he was sort of a sad sack,un pauvre type.

不幸的是,他是一个冒失鬼,很可怜的那种

耶鲁公开课 - 1871年后的法国课程节选

In real life, a sad sack was a miserable person.

CNN: Private Ryan was a hero, but there were bums, too

She does this now rather than ferry her doddering mother (a feisty Frances Sternhagen) to the grocery story or chitchat with her husband (a sad sack John Ellison Conlee) or hover over her daughter (a solid Phoebe Strole).

WSJ: Review: Edie Falco shines in touching 'The Madrid'

For Robert Kraft it all started in 1971 on the cold, hard metal benches of a sad-sack football stadium in Foxboro, Mass.

FORBES: Unlikely Dynasty