往来

contact;intercourse; exchange; dealings
保持～maintain contact; keep in touch/贸易～trade (or commercial) contact(or ties)/友好～ exchange of friendly visits;friendly exchanges(or contacts)/～密切in close contact

• solemn
• solemnity
• solemnize
• sol-fa
• solicit
• solicitor
• solicitous
• solid
• solidarity
• solidify
• soliloquy
• solipsism
• solitaire
• solitary
• solitude
• solo
• Solon
• solstice
• soluble
• solution
• solve
• solvent
• somatic
• sombre
• sombrero