free contributor

基本解释

The result shows that the free state siloxane molecules in the external insulating material is the only contributor that supports the long term product hydrophobicity migration level.
研究了产品外绝缘表面积污期间的憎水迁移过程，结果表明，外绝缘材质中自由状态硅氧烷分子是维持长期运行产品憎水迁移性能的唯一起作用的因素。
If the consumer is new and has never contributed before, he would be no different from a free-rider (he is owed nothing)according to the IND metric computed by the prospective contributor.
如果消费者是新的，以前从来没有贡献，他会从一个搭便车的没有什么不同（他是欠什么）根据实业潜在贡献者的计算指标。

It is a little difficult, to say the least, to try and operate as trader, free-lance writer and contributor to Forbes.com without proper internet access.
FORBES: Living With Downed Trees And No Power In Fairfield County, CT
Jerry Bowyer is a CNBC contributor and author of the upcoming Free Market Capitalist's Survival Guide.
FORBES
It plans to ship more than 800, 000 products free of cost to help promote its e-commerce channel that promises to be a major contributor in the future.
FORBES: Target Tweaks Website, Stock Heading To $58