Flexiback
软背, 软脊(装帧)
🗣️ 情景例句
Isn't it exciting, Grandpa?
真令人兴奋， 是吗， 爷爷？
Have you marketed your product yet?
你们的产品尚未推出市场吗？
Is that all? He doesn't say very much,does he?
就这些吗？他没写许多，是吗？