Helimagnet
[电] 螺旋磁体
🗣️ 情景例句
Susan called early this morning. Susan
一大早打电话来。
You had better leave right now.
现在你最好立刻回去。
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。