complex component短语¹⁴⁴⁹⁷²⁺² 基本例句 复杂零件 But the application and popularization of city sewage cooling and heating source are limited because of the puzzle of bad quality of water, complex component and fouling of city sewage. 但由于城市污水的水质很差、对换热设备污染严重等问题限制了城市污水低位冷热源的推广与应用。 boshuo