【化】 tetramethyl-p-phenylene
four
【医】 quadri-; Quat; quattuor; tetra-
armour; first; nail; shell
【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
era; generation; take the place of
【电】 generation
right; answer; reply; at; check; compare; couple; mutual; opposite; versus; vs
face to face
【计】 P
【化】 dyad
【医】 Adv.; contra-; corps; ob-; p-; pair; par; para-
【经】 vs
【化】 phenylene