One bullet pierced the left side of his chest.

一颗子弹射入了他的左胸。

《柯林斯英汉双解大词典》

The next morning, I wake to find the cat and the little dog sitting on either side of my chest and staring down at me.

第二天早上醒来，我发现猫和小狗各坐在我胸口的一边瞪着我。

youdao

You can either relax on the roller without moving (which opens your chest laterally) or roll gently from side to side to massage the muscles along your spine.

你可以躺在滚筒上不动(这样可以使你的胸腔向两侧打开)，也可以慢慢地滚动，按摩脊柱两侧的肌肉。

youdao

If you have acute pericarditis, the most common symptom is sharp, stabbing chest pain behind the breastbone or in the left side of your chest.

CNN: Pericarditis

Dr. Waltz decided to put an implant in just the right side of my chest -- the right brain controls the left side of the body.

CNN: 'I had brain surgery while I was awake'

He was hit in the left side of his chest with the bullet damaging his lung and aorta.

BBC: England