The word "topsoil" is a noun referring to the top layer of earth, which is the most fertile.
“Topsoil”是一个名词，指表土层或耕作层。
| 单词 | topsoil |
|---|---|
| 音标 | [ˈtɒpsɔɪl] [ˈtɑ:psɔɪl] |
| 释义 | n.["表土（层），耕作（层）","耕层"] |
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