| 释义 |
hard coal
释义
无烟煤：指含有比其他任何形式的煤更多固定碳和最低挥发物（快速蒸发物）含量的煤种，具有最高的热值。
例句
1·The miserable Toad, crouching in the coal -dust, tried hard to think of something to do, with dismal want of success.
可怜的托德蜷缩在煤尘里，拼命想主意，可是苦于想不出来。
2·It may be hard to imagine a planet blacker than coal , but that's what astronomers say they've discovered in our home galaxy with NASA's Kepler space telescope.
很难想象一个行星比煤炭还要黑，但是宇航员们的确声称，他们通过NASA的开普勒太空望远镜在我们所处的银河系发现了这样一颗行星。
3·Planning aside, nuclear plants can be hard to finance, since they cost more and take longer to build than coal - or gas-fired units.
撇开规划不说，相比用煤或煤气作燃料，核电站成本更高，建设周期更长，因而资金筹措也相当困难。
同义词
[矿物]硬煤；无烟煤
bastard coalanthracite coal
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