牙的英語翻譯：

cuspid; tooth; tooth-like thing; tusk
【醫(yī)】 dens; dent-; dental ivory; dentes; denti-; dento-; odont-; odonto-
teeth; tooth

科的英語翻譯：

a branch of academic study; family; pass a sentence; section
【化】 family
【醫(yī)】 department; family; family systematic
【經(jīng)】 accountant's department; division head; section

注射器的英語翻譯：

injector; squirt; syringe
【化】 injector
【醫(yī)】 injector; syringe