我往火里再加了些煤。

I put more coal on the fire.

化石燃料（如煤和石油）属于有限资源。

The fossil fuels ( coal and oil) are finite resources.

用煤作燃料的火力发电站的成本有望降低。

The cost of electricity from coal-fired stations is expected to fall

该法律将鼓励企业转而使用比煤更加清洁的能源。

The law would encourage companies to switch from coal to cleaner fuels

煤的需求下降了，煤价也相应下跌。

Demand for coal is down and so are prices

新英格兰电力公司用煤发电。

The company, New England Electric, burns coal to generate power.

发电站烧的煤产自鲁尔地区。

The power stations burn coal from the Ruhr region

人们早已知道煤能够释放一种易燃气体。

The ability of coal to release a combustible gas has long been known.

这些发动机烧煤，并且需要加水以不断产生蒸汽。

The engines were fired with coal and needed water to keep the steam up.

比起以石油、煤和天然气为燃料的发电站来说，它的污染要小。

It is less polluting than power stations fuelled by oil, coal and gas.

我认为不开采我们自己的煤是非常短视的做法。

I think we're being very short sighted in not exploiting our own coal.

天然气发电比煤便宜。

Gas-fired electricity is cheaper than coal

煤实际上比煤气便宜。

Coal is actually cheaper than gas