Shoot for the stars: đặt mục tiêu, tham vọng cao

Synonyms: Aim high, reach for the sky, have lofty goals, set your sights on the impossible

Antonyms: Settle for mediocrity, play it safe, lower your expectations

Over the moon: hạnh phúc

Synonyms: Ecstatic, elated, on cloud nine, walking on air, beside oneself with joy

Antonyms: Dejected, down in the dumps, blue, disappointed, crestfallen

Once in a blue moon: rất hiếm khi 

Synonyms: Rarely, seldom, infrequently, uncommonly, sporadically

Antonyms: Frequently, often, regularly, all the time, constantly

A drop in the bucket: hạt muối bỏ biển

Synonyms: Insignificant, a mere pittance, a small fry, a trifling matter

Antonyms: Substantial, significant, a game-changer, a major contribution

Lost in space: mất tập trung

Synonyms: Disoriented, bewildered, confused, at sea, out of sorts

Antonyms: Focused, clear-headed, sharp, on track, with it