There's a chance that tap water may contain harmful substances like chlorine and lead.

Source: Tatoeba

I would like to know how these substances are absorbed by the body.

Source: Tatoeba

The substance is light enough to float on the water.

Source: Tatoeba

Stanford University electrical engineering professor Shanhui Fan said the panels—which include a layer of material similar to what is found in sand—act like a kind of high-tech mirror, both siphoning heat out of the buildings and reflecting the sun's rays, sending both 100 kilometers up into the coldness of space.

Source: Tatoeba

Water and ice are the same substance in different forms.

Source: Tatoeba

The mixture of these substances is dangerous.

Source: Tatoeba