(as) straight as a ramrod
US /əz ˈstreɪt əz ə ˈræm.rɑːd/
UK /əz ˈstreɪt əz ə ˈræm.rɑːd/

1.
筆直, 非常直
very straight, especially with reference to a person's posture
:
•
He stood as straight as a ramrod, looking at the general.
他站得筆直,看著將軍。
•
Her back was as straight as a ramrod, even after hours of sitting.
即使坐了幾個小時,她的背也筆直。