Topo
n. （等于toppo）威尼斯平底渔船
🗣️ 情景例句
I major in English and minor in French.
我主修英语，副修法语。
I'm all mixed up.
我全搞混了。
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。