词汇	离差
释义	离差 líchā〔名〕数学dispersion
随便看	a self-ordained foreign policy expert a self-perpetuating caste system a self portrait a self-portrait by van gogh a self-possessed man a self-possessed person a self-pronouncing dictionary a self-propelled golf cart a self-registering anemometer a self-reliant, healthy race A self-renewal movement a self reproach a self-respecting person a self-sealing tire a self-seeking politician A self-service laundry a self-service restaurant a self-styled authority on history a self-supporting community a self-supporting, law-abiding life a self-supporting student a self-targeted revolution a self-taught artist a self-taught man A self-timer is installed in this camera