【电】 Wehnelt cathode
defend; guard; protect
be able to bear or endure
ear; erbium
【医】 aures; auri-; auris; ear; ot-; oto-
especially; special; spy; unusual; very
【化】 tex
cathode; negative pole
【化】 cathode
【医】 Ca; cathelectrode; cathode; Ka.; kathode; negative electrode
negative pole