常見例句用作名詞 (n.)Rosen,however,found a way to improve on nature's Formula.不過,羅森找到了改進(jìn)這一自然配方的辦法。Instead of using the natural protein as a binding agent,Rosen used polyolefins,a type of plastic derived from natural gas.羅森沒有把天然蛋白質(zhì)用作黏郃劑,而是採用從天然氣提取的塑料聚烯烴。 返回 Rosen