Flexiback
软背, 软脊(装帧)
🗣️ 情景例句
The girl always wears a happy smile.
这女孩随时都面带快乐的微笑。
A fox may grow grey, but never good.
狐狸会变，但本性难移。
He shot the lion with a gun.
他用枪把狮子打死了。