Underframes
(underframe 的第三人称 -s形式) 底架[框], 底座
🗣️ 情景例句
She sells sea shells on the shining seashore.
她在亮晶晶的海滩上卖贝壳。
Do you ever study English on Sunday?
你曾经在星期日学英文吗？
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。