The idiom "catch some Z's" is derived from the practice of representing sleep with the letter "Z" in comic strips and cartoons, dating back to the early 20th century. The letter "Z" resembles the visual representation of someone asleep, complete with the Z-shapes rising from their slumbering form. It is often employed to express the need for rest or relaxation, whether it's to combat tiredness, recover from a long day, or rejuvenate oneself.

“catch some Z's”的英语定义和含义

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