topsoil
发布时间:英 ['tɒpsɒɪl]
美['tɑp'sɔɪl]
- n. 表层土；上层土
考试真题
- What about supply? The three environmental trends—the shortage of fresh water, the loss of topsoil and the rising temperatures—are making it increasingly hard to expand the world's grain supply fast enough to keep up with demand.
出自-2016年6月阅读原文
- The three environmental trends—the shortage of fresh water, the loss of topsoil and the rising temperatures—are making it increasingly hard to expand the world's grain supply fast enough to keep up with demand.
2016年6月四级真题（第一套）阅读 Section B