someone or something that doesn't fit or belong in a particular place or situation
某人或某物不适合或不属于特定的地方或情况 (mǒu rén huò mǒu wù bù shìhé huò bù shǔyú tèdìng de dìfāng huò qíngkuàng)
"Putting a modern building in a historical district is like trying to fit a square peg in a round hole."
"把一座现代建筑放在一个历史区域里，就像试图把square peg in a round hole放进去。" (bǎ yī zuò xiàndài jiànzhú fàng zài yīgè lìshǐ qūyù lǐ, jiù xiàng shìtú bǎ **square peg in a round hole** fàng jìnqù.)
it is a waste not to use your mental abilities
to have something very valuable that is not yet realized
a job with no opportunity for advancement or improvement
to work hard on something for a long period
despite great difficulties or challenges
to ignore or hide a problem or mistake
