Meat that people are going to eat in America is inspected. If it is good enough to eat, inspectors give the meat a stamp showing it is approved. The expression ‘stamp of approval’ has become part of regular speech. A completed project can receive a ‘figurative’ stamp of approval by an employer, parent, or friend.
合格，過關了!
在美國，食用肉品必須經過詳細的檢查，若是符合食用標準，審核員就會蓋上合格標章。因此‘stamp of approval’可以用來形容通過審核，過關了。