Poor:

① 貧窮的；貧寒的；清貧的 

② 蹩腳的；不好的

例句：

① They were too poor to buy shoes for the kids.

他們窮得沒錢給孩子買鞋穿。

② My grandpa has been in poor health for several years.

我爺爺最近幾年身體不太好。

Dirt poor:

窮的泥土 ×

窮到吃土 √

例句：

I've been out of a job for half a year and I am dirt poor now.

我已經(jīng)失業(yè)半年了，窮到吃土了。