| 释义 |
coal deposits短语⁵⁴⁰⁰⁰
基本例句
煤矿床,煤藏,煤炭矿床
The North-China type karst coal deposits mainly refer to the workable coal seams of Permo- Carboniferous system in mine areas endangered by water hazards from Middle Ordovician limestone.
华北型岩溶煤田系指主采煤层主要受中奥陶统灰岩水害威胁的石炭二叠系煤矿区。 cnki
The coal deposits in these areas are generally of good quality.
这些地区的煤矿质量通常都很好。 www.1x1y.com.cn
There's a story about an old coal miner who didn't need geologic data to find coal deposits.
有一个关于老煤矿工不需要地质数据来发现煤矿点的故事。 ibm |