English Idioms: Acid test

English Idioms About “Science”
Idiom: Acid test
Meaning: The idiom acid test refers to a decisive test whose findings show the worth or quality of something.
Example: Our team’s next match will be the first real acid test in this competition.

English Idioms: Time is money

English Idioms About “Money”
Idiom: Time is money
Meaning: A proverb which means that one should not waste time, because one could be using it to earn money.
Example: I have to wake up and go to work – time is money