单词	even-mass--number
释义	number， even-mass偶质量数
随便看	relative stillstand of sea level relative stopping power relative strength relative sunshine relative sunshine duration relative sunspot number relative supersaturation relative supply relative supply curve relative surface fitting relative surplus population relative survival relative systematic error relative tack relative tape sensitivity relative target relative target altitude relative target bearing relative target speed relative technology advantage relative temperature index relative temperature index, rti relative tensor relative tensor field relative term