back-up 的近义词 7 个

• different
• second
• substitute
• surrogate
• another
• flipside
• other side

back-up 的近义词 6 个

• back
• background
• backing
• harmony
• instrument
• part

back-up 的近义词 14 个

• opportunity
• option
• substitute
• druthers
• pick
• preference
• recourse
• redundancy
• selection
• sub
• other
• other fish in sea
• other fish to fry
• take it or leave it

back-up 的反义词 6 个

• rejection
• compulsion
• constraint
• necessity
• obligation
• restraint