coalfields怎么读？

coalfields的音标：

相关问题

coalfields造句

On a global scale, there are many coalfields suffered from spontaneous combustion of coal seam problems.在全球范围内, 许多煤田都存在煤层自燃问题....
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- #造句
coalfields什么意思

n.煤田( coalfield的名词复数 )...
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- #释义