pyramid
- n. 金字塔；角锥体
- vi. 渐增；上涨；成金字塔状
- vt. 使…渐增；使…上涨；使…成金字塔状
英英释意
- 1. a polyhedron having a polygonal base and triangular sides with a common vertex
- 2. (stock market) a series of transactions in which the speculator increases his holdings by using the rising market value of those holdings as margin for further purchases