biphenyl

"Gasoline is a hydrocarbon fuel used in many cars. "

"The science teacher conducted an experiment to demonstrate how plants grow in different types of soil. "

"The water from the well was surprisingly colourless, almost like air. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The computer technician fixed the broken printer in the school library. "

"The project consists of three main parts. "

"To make it safer for use in the classroom, the lab technician halogenated the organic solvent, making it less flammable. "

"I had no shallots so I substituted onion."

"The teacher's lesson plan was together, covering all the key concepts logically. "

"Although biphenyls were once widely used in industry for heat transfer fluids, their persistence in the environment raised concerns about potential health risks. "

"He said he didn’t do it, but the evidence was otherwise."

"We measured the temperature with a thermometer.   You should measure the angle with a spirit level."