液体和固体废物被收集在罐子里。

Liquid and ___solid waste is collected in the tank.

将混合物冷冻约3小时左右，直到变为固态。

Freeze the mixture for about 3 hours or so until ___solid.

在全球产生的总电量中，固体燃料是迄今为止最重要的贡献者（44%）。

Of the total amount of electrical power produced in the world, ___solid fuel is by far the most important contributor ___44%.