(informal, saying)used to say that something is as good or effective as it claims to be, or that it really does what it claims to do. This expression is especially used when you are comparing advertisements with actual products.（尤用于比较广告宣传和实际产品）和所说的一样好，名副其实
I paid £150 for this camera and am more than happy with it. It does exactly what it says on the tin!我花 150 英镑买了这架照相机，真是十分令人满意。它和广告所说的别无二致！