单词	1}
释义	同hydrogen {H-- 1}
随便看	parallel nonintegrated systems parallel oblique lines parallel oblique pattern parallel oblique seismic reflection configuration parallel octaves parallelodontidae parallelodrome parallel of altitude parallel of declination parallel offset route parallel of latitude parallelogeotropism parallelogram parallelogram condenser parallelogram identity parallelogram inverter parallelogram law parallelogramm parallelogramm der kräfte parallelogram method parallelogram of force s parallelogram of forces parallelogram of period parallelogram pantograph parallelogram rule