Public expenditure was being stretched to the limit by having to support 3 million unemployed people.因为要救济 300 万失业人口，公共支出即将被耗尽。Raise the fee limit, while making universities raise money for bursaries.提高学费的上限, 同时让大学为助学金筹款...
每种动物都有自己的生态位.Each animal has its ecological niche.生态位: 生物体所占据生境的最小单位.Niche: Smallest unit of a habitat that is occupied by an organism.生态位战略之二是生态位分离和生态位扩充战略.Second niche strategy is niche separation and niche expansion s...