dement造句怎么写

The linear regression model is used to calculate and measure the effect of investment to economic growth in regions of the Bohai, Yangtze River Delta, Pearl River Delta and the Central Region of China, and different degrees of investment dement in the interior of the four regions.

Its heating dement, instead of being a bare resistance wire, uses a device of insert heating tube, which will not burn red and will not make the surface of the chafing dish electrified, thus ensuring its safety and durability.