The idiom "the heat is on" is believed to have originated in the United States in the early 20th century. It likely comes from the idea of increased pressure or intensity when things become heated, just like in a situation where temperature rises. This idiom is used to indicate that a situation has become tense, critical, or intense.

Định nghĩa và ý nghĩa của "the heat is on"trong tiếng Anh

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