vaccination

n. 预防注射，种痘

Utopia, Utopian, utter, utterance, utterly, uttermost, uvula, V, V (also v), V and A, V, v, v.=inquire, vac, vacacy, vacancy, vacant, vacant possession, vacate, vacation, vaccinate, vaccine, vaccum cleaner, vacillate, vacillation, vacuity, vacuous, vacuously, vacuousness, vacuum, vacuum cleaner, vacuum pump, vacuum tube (US) (Brit radio valve), vacuum-packed, vade-mecum, vagabond, vagary, vagina, vaginal, vagrancy, vagrant,