pindexpreemergence./pree-i-mur-juhns/US // ˌpri ɪˈmɜr dʒəns //苗前,萌芽前,苗前工作,芽前Definitionsadj.adjective · 形容词1.›occurring or applied before the emergence of a plant from the soil: preemergence herbicide.Level 3More words in p →