石炭は大部分が炭素から成っている。の英語

Coal consists mostly of carbon.

Coal consists mostly of carbon.

coal is a hard black material

relating to or consisting of or yielding carbon

Bricks consist mostly of clay.

coal of poor quality

a kind of coal called black coal

bad coal that is dug out from coal mine

carbonize coal

coal gas is produced by the gasification of coal

stoke up the boiler with coal

to mine coal from a coal bed

the coals that have yet to be sorted

We can get many coals here.

There are many coal-fields in Japan.

a type of Japanese charcoal, called 'ishigamazui'

charcoal called {small-cut charcoal}

Coal is a fossil fuel.

Coal is chemically allied to diamonds.

break coal into small lumps

of coal, as contrasted with coal obtained from a strip mine

large metal container in which coal or charcoal is burned

rich seams of coal

carbon fuel produced by distillation of coal

This coal is of superior quality―superior in quality.

We have used up the coal.

Coal is not always black.

The coal is burning.

The coals are burning red.

They burned some coal.