Furthermore, trend extrapolation is used to forecast the developing trend and orientation of Ningxia tourism industry.

进一步运用趋势外推法，预测了宁夏旅游业近期的发展趋势及走向。

youdao

Furthermore, trend extrapolation is used to forecast the developing trend and orientation of Ningxia tourism industry.

进一步运用趋势外推法，预测了宁夏旅游业近期的发展趋势及走向。

youdao