in on the ground floor 的近义词 13 个

• behind closed doors
• between ourselves
• between us
• between you and me
• covertly
• don't breathe a word
• hushedly
• in confidence
• off the cuff
• off the record
• personally
• privately
• sub rosa

in on the ground floor 的反义词 4 个

• commonly
• familiarly
• openly
• publicly