c/o
uk/ˌsiːˈəʊ/ us/ˌsiːˈoʊ/
由…转交（care of的缩写）
abbreviation for care of: used in addresses when the person you are writing to is staying at someone else's home
Sylvia Mendez, c/o Ann Smith, 12 Glastonbury Lane, Bickerton 比克顿格拉斯顿伯里巷12号安‧史密斯收，转交西尔维娅‧门德斯