"The effectofpopulationdensity on life satisfaction was therefore more than twice as large for low-IQ individuals than for high-IQ individuals," they found.
他们发现“人口密度对低智商人群在生活满意度上的影响是高智商人群的两倍。”
2
Plants, especially in populationof two years, have bigger bodies in low and middle densities than that in high densities in field. It's the effect of density dependence.