The midsection is the middle part of something — a plane, a book, a piece of fruit — and very often the middle of a person’s body, around the waist and stomach. American English uses it a fair bit, especially in sport and fitness, where midsection and core show up in the same gym sentences.

The midsectionmidsection is the middle part of something指的是某樣東西的中間部分 — a plane, a book, a piece of fruit飛機、書、一塊水果 — and也 very often常常指 the middle of a person's body一個人身體的中間, around the waist and stomach也就是腰腹一帶。American English美式英文 uses it a fair bit用得還蠻多, especially in sport and fitness尤其在運動和健身領域, where midsection and core show up in the same gym sentencesmidsection和core常常出現在同一句健身房用語裡

It is a bit more formal or technical than belly, and a bit wider than midriff: midriff is almost always that band of a person’s front, while midsection can be the middle of any long thing, or the whole middle of the trunk, including the sides and back. If a report says the midsection of a train was damaged, it means the cars in the middle, not anyone’s stomach.

It它 is a bit more formal or technical比正式一點、專業一點 than belly比belly（肚子）, and也 a bit wider範圍又廣一點 than midriff比midriff（腰腹前側）: midriff is almost always that band of a person's front midriff幾乎都只指身體前面那一圈, while而 midsection can be the middle of any long thing midsection可以是任何長條物的中間, or the whole middle of the trunk也可以是整個軀幹的中段, including the sides and back包含側面和背面。If a report says如果報導說 the midsection of a train was damaged一列火車的midsection受損, it means指的是 the cars in the middle中間那幾節車廂, not anyone's stomach不是誰的肚子