树干 /shùgàn/ angolul

stem [stems]▼(botany: above-ground stalk of a vascular plant)
noun
[UK: stem] [US: ˈstem]

tree trunk▼(the main structural member of a tree)
noun
[UK: triː trʌŋk] [US: ˈtriː ˈtrəŋk]

trunk [trunks]▼(tree trunk)
noun
[UK: trʌŋk] [US: ˈtrəŋk]