belly

Compared meaning: the belly area, between chest and legs (noun).

比较义项：躯干前部、胸部与腿之间的部位——腹部（名词）。

• belly 本词

  Informal, everyday word for this area; often used playfully or for animals; sounds too casual in clinical or polite contexts.

  口语化、日常用词，常带诙谐意味，也常用来指动物的腹部；在正式或医学语境中显得过于随意。

  The dog rolled over so we could rub its belly.

  那只狗翻过身，好让我们摸摸它的肚子。

• stomach

  The most common everyday word for this area, especially for describing feelings like hunger, nervousness or fullness; neutral register, mainly used for people.

  是描述这个部位最常用的日常用词，尤其用来表达饥饿、紧张或吃饱等感觉；语气中性，主要用于人。

  My stomach growled loudly during the long meeting.

  在那场很长的会议中，我的肚子咕咕叫得很响。

• abdomen

  Formal, clinical or anatomical term used mainly by doctors or in medical writing; sounds distant or overly technical in casual conversation.

  正式的解剖学、医学用语，主要用于医生或医学文本中；在日常口语中显得生硬、过于专业。

  The doctor pressed gently on his abdomen to check for pain.

  医生轻轻按压他的腹部，检查是否疼痛。

Belly, stomach, and abdomen all name the body area between chest and legs. Belly is casual, also for animals. Stomach is the everyday word, often for hunger or nerves. Abdomen is formal and medical. Stomach's 'digestive organ' sense is not compared here.

这三个词都指人或动物躯干前部、胸腔与腿之间的部位，但正式程度不同：belly最口语化，也常用于动物；stomach是日常生活中最常用的说法，尤其用来描述饥饿、紧张等感觉；abdomen是解剖学、医学用语，正式而精确。这里不比较stomach作为“胃”这一消化器官的常见义项。