a-boutCOCA³¹⁵¹¹¹⁺⁴ 例句 For pension being one of the main means of slowing down the aging population pressure, the research a-bout the effects of pension on the retirement behaviors has becomea hot topic. 养老保险作为减缓人口老龄化压力的主要手段之一，对劳动者退休行为的影响已经成为研究热点。 cnki