They’ve found a substance of unknown origin.
The active substance of the product will remain our secret.
A spider can produce a silky substance from tiny openings on its underside.
Carbon monoxide is a poisonous substance formed by the incomplete combustion of carbon compounds.
a harmful substance
The reason the Northern and Southern Dynasties had failed in their rule was that they allowed literary splendor to surpass real substance.
Water and ice are the same substance in different forms.
U.S. researchers assembled carbon nanotubes to create the world's blackest substance, able to absorb over 99 percent of light that hits it.
According to the "ahl al-haqq" the universe consists of only one substance, and all what we name generations and corruptions, death and life, is a mere combination or dissolution of modes.
The substance can irritate or corrode the skin, eyes, or mucous membranes.
Water in rivers is contaminated with various chemical substances.
This trick works because the waxy substance in the banana skin fills in the scratch.
There was a strange sticky substance on the path by Frederick's house, so he decided to inspect it.
You should avoid this substance because it's carcinogenic.
When you swallow a dangerous substance, what you need to do depends on what you swallowed.