bellow

Compared meaning: to make a loud, deep sound (verb).

比较义项：发出洪亮低沉的吼叫声（动词）。

• roar

  Roar is the more general word for any loud, deep sound — animals, crowds, engines, or a person shouting from excitement, pain, or anger — without necessarily implying anger or spoken words.

  roar 是更泛化的词，可以指任何洪亮低沉的声音——动物、人群、引擎，或因兴奋、疼痛、愤怒而发出的喊声——不一定带有怒气，也不一定说出具体词语。

  The crowd roared with excitement when the home team scored the winning goal.

  当主队打进制胜一球时，人群兴奋地大声欢呼呐喊。

• bellow 本词

  Bellow specifically describes a person shouting in a loud, deep, angry or commanding voice, often giving orders; it sounds harsher and more forceful than roar.

  bellow 特指人以洪亮低沉、愤怒或命令式的语气大喊，常用于发号施令，听起来比 roar 更强硬、更具压迫感。

  The angry coach began to bellow orders from the sideline.

  那位愤怒的教练开始在场边大吼着下达指令。

Roar and bellow both mean to make a loud, deep sound, but differ. Roar is the more general word, for animals, crowds, or a shouting person, not always angry. Bellow means a person shouting in a loud, angry, commanding voice; it sounds harsher than roar.

这两个词都表示发出洪亮低沉的声音，但语气和场合不同：roar 更泛指各种洪亮低沉的声响——人、动物、人群、引擎等皆可，不一定带怒气；bellow 则专指人愤怒地大声吼叫或喝令，语气更强烈，常带命令口吻。