coals

过去式：

动词过去式: coaled

更多词形：

动词过去式: coaled | 动词过去分词: coaled | 动词现在分词: coaling | 动词第三人称单数: coals |

单词例句：

The coal industry is running down as coal supplies are used up.

由于煤炭的来源枯竭，煤炭工业正在衰退。

Conversion of your heating system from coal to gas will be costly.

你把暖气系统由烧煤改造成烧瓦斯会花好多钱。

Coal is a fossil fuel.

煤是一种矿物燃料。

In a modern coal burning electric generating plant the steam may be hot enough to ignite wood.

在一个烧煤的现代化发电厂内，蒸汽允许能热到足以把木头点燃起来。

Coal can be converted to gas.

煤可以转化成煤气。

He put a shovel of coal on to the fire.

他往火炉里加了一铲煤。

I shall be glad if you will forward fifty tons of coal, in accordance with your sample.

请按照贵公司提供的样品，供应我公司50吨煤炭，谢谢。

That coal mine is no longer worked.

那个煤矿已经不经营了。

The burning coals started to flame yellow and orange.

燃烧著的煤开始发出了黄色与橙色的火焰。