This lesson trains 4 C2 idioms on Science. Idioms signal fluency when used naturally — forcing them into every sentence hurts your score. Practise in the runner first, then revisit every expression in the glossary. Review mode after completion shows how each idiom fits its context.
Be light years away from sth
To be very far from achieving or understanding something.
The current prototype was nowhere near the advanced design shown in the concept video.
At the cutting edge
Using or involved in the most advanced techniques or ideas.
The research lab was developing new artificial intelligence applications.
Ahead of its time
More advanced or modern than the current period.
The inventor's design for a portable computer was dismissed in the 1970s but became standard decades later.
Necessity is the mother of invention.
When there is a strong need, people find new ways to solve problems.
The lack of clean water led to the development of a new filtration system.