The ready availability of coal inspired William Murdoch during the 1790s to develop the first new form of nighttime illumination to be discovered in a millennium and a half.

威廉·默多克在18世纪90年代受到煤炭的易得性的启发，发明了1500年里的第一种新的夜间照明方式。

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With analysis on present use of coal resources, a new way of coal resource exploitation and its availability are discussed.

在分析燃煤工业资源利用现状基础上，探讨了燃煤工业资源开发的新途径。

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Another important factor to be considered in choosing the place is the availability of coal in ample quantities.

选择地点时要考虑的另一个因素是要有大量的煤可以利用。

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Various factors influence this relationship such as the availability of cheaper substitutes like coal and natural gas as well as total refining capacity.

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But the closure of such plants has also been hastened by the availability of cheap natural gas from fracking, which makes coal less viable economically, especially when utilities must invest in pollution controls.

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