The phrase "in high gear" is believed to have originated in the early 20th century, and it is a reference to the highest gear in a manual transmission vehicle, which allows for the fastest and most efficient speed. This idiom is used to describe a situation where someone is operating at their highest level of productivity or efficiency.

What is the origin of the idiom "in high gear" and when to use it?

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英語での「 in high gear」の定義と意味

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