coalfields的翻译，读音

词态

例句

Karstic collapse posts existing in North China type coalfields is a special kind of karstic collapse. 华北型煤田中发育的岩溶陷落柱是一种特殊类型的岩溶塌陷。

The roadworks are necessary to repair damage caused by an increase in cargo lorries using the highway after large coalfields were discovered in Inner Mongolia. 内蒙古发现大型煤田后，行驶在该路段的货运卡车相应增加，为了修复卡车对路面造成的损伤对道路进行施工显得十分必要。