The word ('crust') is a noun that refers to the hard outer layer of something or the crust of the Earth.
这个词 ('crust') 是一个名词，指物体坚硬的外皮或外壳，也指地壳。
| 英语单词 | crust |
|---|---|
| 英美音标 | 英/ krʌst / |
| 中文释义 | 硬外皮，硬外壳；地壳 |
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