词汇	direct charges
释义	direct charges 可变费用,直接费用
随便看	downward-compatibility downward compatible downward-compatible downward compression Downward conjugate gaze downward continuation downward continuation directly downward continuation of potential field downward continuation technique downward-continued field downward conversion downward conveyer downward core pulling downward counterfactual downward cumulation downward current downward deflection downward delamination downward displacement of J point Downward displacement of ovary downward displacement of pacemaker downward displacement of the tricuspid valve downward displacement of tricuspid valve downward displacement sterilizer downward displacement ventilation