流光过隙，叹杏梁双燕如客。 人何在？一帘淡月，仿佛照颜色。192杜甫：咏怀古迹五首之三Current wisdom says that (当前流行的看法认为)if you want a successful product, you need first to perform detailed market analysis, making sure that there are plenty of people who need the new product and that your entry into the market will be able to gain a significant share of that market.
