1、外快
...plain sailing一帆风顺，轻而易举之事；side money外快；sixth sense第六感； ...
2、隐性收入
...东开发开放为龙头,进一步开放长江沿岸城市 open more cities along 隐性收入 invisible income; off-payroll income; side money 以质量求生存、求发展、求效益 "strive for survival, ..
3、隐形收入
... recessive unemployment 隐性失业 invisible income;off-payroll income;side money 隐形收入 roller coaster 游乐场过山车 ...
4、横财
... sick to death 因病致死 side money 横财 silly as a goose 蠢蛋 ...