It is believed that this was the first time that soft material met with in tunneling under a river has been solidified by means of fire. 佚名.神奇的知识之书.
These first rocks must have solidified as a cake over glowing liquid material beneath, much as cooling lava does. 赫伯特·乔治·威尔斯.世界史纲.
New metals, chemicals, and elements had become available in large numbers, gases had been liquefied and solidified, and the range of useful heat and cold indefinitely extended. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Below this steam atmosphere the molten world-stuff solidified as the first rocks. 赫伯特·乔治·威尔斯.世界史纲.