English Idioms About “Science”
Idiom: Well-oiled machine
Meaning: The phrase well-oiled machine refers to something that operates well.
Example: Their office ran like a well-oiled machine.

English Idioms About “Work”
Idiom: All work and no play makes Jack a dull boy
Meaning: All work and no play makes Jack a dull boy is a proverb which means that it is not good to work all the time and that people may get bored if they don’t get some time off from work. This saying appeared first in James Howell’s Proverbs in English, Italian, French and Spanish (1659), and was included in later collections of proverbs. Some writers have added a second part to the proverb: All work and no play makes Jack a dull boy, All play and no work makes Jack a mere toy.
Example: I think you need to go out and have some fun. You know all work and no play makes Jack a dull boy.

English Idioms About “General”
Idiom: X marks the spot.
Meaning: Said to show the exact spot.
Example: Would you mind moving that armchair here – X marks the spot.