Sharpening
n. 加强；刻石；削尖；锐磨
✅ 同义词
🗣️ 情景例句
What are you doing?
在做什么？
Would you meet me 3:30?
你能在三点版和我见面吗？
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。