a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates
the 6th letter of the Roman alphabet
造句
That word is spelt with a PH, not an F. 那個(gè)字里的f音拼作PH而不是F。