To a person, back and belly is first.

对个人来说，首要的是衣食。

youdao

I'm obliged to keep them back and belly.

我有义务供给他们吃穿。

youdao

Misers put their back and belly into their pockets.

守财奴宁肯挨饿受冻也舍不得花钱。

youdao

To get beyond Eggleston's Freudian couch, swine also need a 2-inch-thick layer of exterior fat along the belly and back.

WSJ: High on the Hog

He looked depressed a lot, but he would laugh good, too, you know, the kind that he'd hold his belly and lean back and just crack up.

NPR: Remembering Army Pfc. Kenneth Zeigler

He lay on his armor-like back, and if he lifted his head a little he could see his brown belly, slightly domed and divided by arches into stiff segments.

WSJ: A.B. Yehoshua, Author of Mr. Mani, on the Limits of Imagination | Word Craft