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If a young bird cheeps, it makes a weak, high, thin sound — the little “cheep-cheep” of a chick calling for its mother, or sitting in the nest a bit cold or hungry. Grown birds more often chirp or sing; cheep belongs especially to that baby-bird noise. You can use it as a verb (the chicks cheeped) or as a noun (a cheep). It is a sound-word: English copied the noise itself. Though actually, people also say they did not hear a cheep from someone, meaning the person made no sound at all — not even a tiny one.
啾啾叫（小鳥）
組成Onomatopoeic: English copied the high, weak noise a chick makes. Used as both a verb and a noun.
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
cheepverb/t͡ʃiːp/
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Of a small bird, to make short, high-pitched sounds.
- […] a brood of ducklings, which had lost their mother, filed into the barn, cheeping feebly and wandering from side to side […]
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To express in a chirping tone.
- O Swallow, Swallow, if I could follow, and light / Upon her lattice, I would pipe and trill, / And cheep and twitter twenty million loves.
cheepnoun/t͡ʃiːp/
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A short, high-pitched sound made by a small bird.
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A similar-sounding short high-pitched sound
- The radiation trackers clipped to our protective overalls let off soft cheeps, their frequency varying as radioactivity levels changed around us.
cheepintj/t͡ʃiːp/
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The short, high-pitched sound made by a small bird.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。