Idiom 155: run ragged

지치고 피곤하다라고 할 때 사용하지요. tired대신에 많이 사용합니다.

run ragged = tire = exhaust

I haven't had a day off in 2 months and feel like I'm running ragged.

Idiom 154: put one's finger on

어떠한 사실을 확실히 지적할 때 사용합니다.

put one's finger on = find precisely = remember exactly

She didn't know what was causing the problem, but she finally put her finger on it.