prime number [prime numbers](natural number) noun [UK: praɪm ˈnʌm.bə(r)] [US: ˈpraɪm ˈnʌm.br̩]
植树 /zhíshù/ noun
arboriculture [arboricultures](branch of horticulture concerned with the planting and growth of trees) noun [UK: ˈɑː.bə.rɪk.ʌl.tʃə] [US: ˈɑːr.bə.rək.ʌl.tʃər]