One afternoon,as I was running errands with my 5-year-olddaughter,Danielle,she called to me from the back seat with arevelation.“Guess what,Mommy!I’m a hand-
Er3+ doped potassium gadolinium molybdate (KGM) phosphor with sensitizer Yb3+ ion was synthesized by the Pechini method using citric acid and ethylene glycol. T
词条:incumbent[in’k(?)mb(?0nt]n.释义:the holder of an office,esp.a political office(LM);the holder of anoffice or ecclesiastical benefice(WNNCD)例句:On the st