The film star is keen on public welfare undertakings. 这位影星热衷于公益事业。
Charity advertisements aim at evoking public sympathy. 公益广告旨在引发公众的同情心。
The public belonging property of natural resources and capital rareness are its condition. 自然资源的公共物品属性以及资本的稀缺性是生产力异化的条件。
The authors explored those different aggregation technology models and their influence on the amount of public goods, and then some review was posed. 于是，该文作者考察了不同加总技术的公共物品分类及其对公共物品供给量的影响，在此基础上进行了简要评述和展望。
