先进技术和成熟管理经验 advanced technologies and sophisticated managerial expertise
成熟的经验 ripe experience
既不成熟又无经验的 callow immature and inexperienced
但是，我国铁路在无砟轨道施工技术方面尚缺乏成熟经验。
However, the construction technology of ballast less track still lacked mature experience.
但有关空调结构设计的资料少之又少，设计人员无成熟经验可借鉴。
But there are few materials about structural design of the air conditioner, the designer has no ripe experience to draw lessons from.
一些公司有管理拥有企业和系统层次的产品的成熟经验，并从评价这些产品中获益匪浅。
Some organizations have mature practices managing their as-is artifacts for the enterprise and system levels, and are reaping the benefits of leveraging these artifacts.
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