Flexiback
软背, 软脊(装帧)
🗣️ 情景例句
Marriage is an institution not to be taken lightly.
婚姻是个不能儿戏的体系。
I'm fine, too.
我也很好。
It's raining! That means You don't need to water the garden.
下雨了，这就是就是说，你不必给花园浇水了。