All of these changes usually fall within the range of acceptable norms, but there are 200 million men out there with erection problems, which is why Viagra has taken the world by storm. Dr. Lin also offers the encouraging news that just having trouble once doesn't mean you'll never get your groove back again.
這種種變化，多半都在可容忍的正常範圍內，但全球仍有高達兩億的潛在「不舉」人口，才會讓藍色小丸子「威而剛」所向披靡。