Pycnocline
n. (海洋)密度跃层
🗣️ 情景例句
if that's what you mean.
是这个意思吧。
I've got to be going now, Good-bye.
我得走了，再见。
It marked the end of the great tradition of ships with sails and the beginning of a new era.
它标志着帆船伟大传统的结束与一个新纪元的开始。