Hardcover
a. 硬书皮的\\nn. 硬封面的书, 精装书
✅ 同义词
🗣️ 情景例句
I hope he's in a good mood.
我希望他心情不错。
I wonder if it's a real diamond.
它可是地道的钻石呀。
So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
从测定海深到测定鱼群，这一进展比较容易。