Codename
n. 研发代码；代号
🗣️ 情景例句
It's called
它的题目是
My sister worked as a secretary before she got married.
在她结婚了以前，我的姐姐为一位秘书。
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。