If the chest is sticking out then the middle of the back will be flat allowing for the spinal cord to stack in a vertical line.

如果胸膛往外挺拔，背部的中段部位就会笔直，这样允许脊柱能形成一条垂直线。

youdao

Objective TO review the surgical experience of sternal turnover with rectus muscle pedicle (STO-RMP) and sternal overlapping suture in the treatment of funnel chest and flat chest.

目的总结漏斗胸及扁平胸施行腹直肌蒂胸骨翻转术(STO - RMP)及胸骨重叠术的治疗经验和体会。

youdao

Echocardiography of 91 cases of flat chest (straight back) syndrome were reported.

报告91例扁平胸(直背)综合征患者心脏经超声心动图检查。

youdao

Every week at its warehouse in Menlo Park, California some 10, 000 sheets of stamps, tens of thousands of posters and 20, 000 T shirts--almost every shirt unique and distinct from all the others--roll off the presses, sparkling with freshly printed images of cute kids, Disney characters, landscape shots and catchy tag lines (sample:"Not everything's flat in Lubbock, "reads the chest-high line on one).

FORBES: Zazzle It

The blazers feature the official U.S. Olympic and Paralympic Team patch and embroidered Big Pony logo at the chest and are paired with cuffed cream flat-front trousers.

FORBES: Ralph Lauren Olympic Uniforms Revealed On The Today Show