Or take trashinc inerators: The thinking behind them is similar to electrical generating plants, except that the "fuel" is garbage, so there is a very high degree of difficulty in controlling the exhausts spewed into the air. It is thus essential to get help from the countries advanced in this field.
又譬如垃圾焚化爐，它的原理和發電廠差不多，只是輸入的「燃料」是垃圾，因此在控制廢氣排放的技術上難度更高，藉助先進國家之力，也就勢在必行。