维护

maintain; uphold; defend; preserve; protect; support; keep; sustain; service; redeem; assert; care for; keep up; stand by; look after; stick up for; maintenance; upkeep; preservation; defense; servicing

不善

ill; bad; poor; unkind; inept; incompetent; unskilled; malevolent; be bad at; be poor at; be inept at; be unskilled at