to play a central role; to take a leading part
executable (e.g. executable file); capable of putting into practice
reduced scale; scaling down
right triangle; right-angled triangle
leveling instrument; levelling instrument; surveyor's level; builder's level; dumpy level; y level
alphabet; ABCs; the ABCs (of); basics; activity-based costing; ABC
BC; Before Christ; biological and chemical (weapons)
interior angle; internal angle; inside corner
difficulty; trouble; accident; disaster; fault; defect
skeptical; sceptical; incredulous
ideological slant; aspect of thought; intellectual character
again and again; repeatedly
setback; failure (e.g. plans, business); frustration; discouragement
to infer; to figure out; to get an idea of; to tell; to imagine; to guess
to be due to; to be caused by; to depend on; to turn on; to be based on; to come from
forever; everlastingly; for many years to come; ever
to detain; to keep; to lock up; to retain; to leave (a letter) till called for
what kind of; whatever sort of; no matter what; however much
to be titled (e.g. a book); to be named
rough (estimate, outline, etc.); broad; general; generous; openhanded
approximate value; approximation
numerical value; figure; result; reading (on a meter, etc.)
official; formal; formula (e.g. mathematical); official (social media) account (of a company, organization, etc.)
resemblance; likeness; similarity; analogy
correction; revision; compensation (e.g. to a pendulum)
correct or incorrect; right or wrong; accuracy; correction (of errors)
how much; how many; however (much); no matter how; what matters is ...; it all comes down to ...
around the clock; day and night
in confusion; in a fluster; in bewilderment; sobbing; tearfully; trembling (voice)
17th day of the month; 17 days
way of writing; manner of writing; penmanship (esp. used in old textbooks); calligraphy; format (e.g. of a report); stroke order of a character
friendly match; friendly; exhibition game
friendship; goodwill; friendly relations; amity
to reveal one's true intentions; to show one's cards
don't worry about it; it's nothing; don't give it a thought
judgement; judgment; refereeing; umpiring; judgement (of God); referee