The word 'knocking' is a noun that refers to a metallic rattling or tapping sound, often indicating an engine malfunction, or a faulty noise.
单词 'knocking' 是一个名词，指爆震音或卡答卡答的故障声音。
| 单词 | knocking |
|---|---|
| 发音 | ['nɔkiŋ] |
| 释义 | n. 爆震音；卡答卡答的故障声音 |
| 词序 | 16709 |
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