Retroflection
n. 反曲, 翻转, 后屈
🗣️ 情景例句
Pleasant dreams.
祝你有个好梦。
Please give my best regards to your family.
请代我致最高的敬意，向你的家人问好。
Before they were replaced by steamships,
在蒸汽船取代帆船之前。