果实的衰老，也就是成熟以后所产生的败坏过程，尚未被深入地研究。
进入21世纪以来，减轻环境污染和遏制生态恶化趋势已成为人们关注的焦点。
1·Thin-layer chromatographic analysis indicated the contents of lecithin and phosphatidyl ethanolamine in deteriorative phosphatide were reduced visibly.
薄层色谱分析表明：变质磷脂中卵磷脂、脑磷脂含量明显减少。
2·This paper briefly analyzed the deteriorative reasons of the packaged food, medicine, etc.
简介了包装物品食品、药品变质的原因；
3·Molten-salt electrolytic preparation of deteriorative agent AlSr alloy by using liquid A1 as cathode is characterized by such advantages as simple process, low cost and high product purity.
采用液态铝阴极熔盐电解法来制取作变质剂用的铝锶合金，具有工艺简单、成本低、产品纯度高的优点。