警察很快把火势控制住了.当加热时,水就会变成水蒸气.当它们表示友好时,动物们显得很温顺.用英语说.

警察很快把火势控制住了.The police kept down the fire soon.
加热时,水就会变成水蒸气.If it is heated,water turns into steam.
当它们表示友好时,动物们显得很温顺.When they are friendly,the animals seem very gentle.

警察很快把火势控制住了
The firemen soon control the fire.（警察police,消防员firemen）
当加热时,水就会变成水蒸气
When heated,the water will become steam.
当它们表示友好时,动物们显得很温顺
The animals will seem gentle if they are showing their armities.

The police a fire tendency firmly will be controlled soon very much.
That water only is capable to do should heat when, becomes steam.
When they indicate their amicable,the animals appear very docile.