expend structure的用法和樣例：
例句
- The consumption structure of local residents is improving steadily.
居民消費結構不斷優(yōu)化。 - It also eaculates sometypical Enger coefficients in china and establishes three structural models which illustrate the changes of theconsumption structure.
計算了我國一些代表年份的恩格爾系數并建立了三個(gè)結構模型以說(shuō)明消費結構的變化。
