1)nabla,倒三角算子2)nabla operator,倒三角算子3)nabla calculation,倒三角算子计算4)upside-down triangle,倒三角5)tricepstrum underwater acoustic channel,倒三谱6)up-side down triangle,倒三角形7)Top third leaf,倒三叶8)del,倒三角形9)del operator,倒三角形10)inverted triangle station position,倒三角布站
用法例句
Based on the current situation of the supply and demand of China s medical and health resource, this paper, with the data collected, expounds the inharmonious phenomenon of "upside-down triangle" and "regular triangle" in the first part.
