研发投入占总收入的比例本身没有意义。关键是研发的效率——同样的钱花出去,带来了多少新产品、多少新增增长。为研发而研发,不如不研发。
R&D spending as a percentage of revenue means nothing by itself. What matters is R&D efficiency — how many new products and incremental growth come from that spending. R&D for R&D's sake is worse than no R&D at all.