Agriculture provided a more dependable source of food, causing populations to increase; eventually excess population migrated to new lands.
农业提供了更加可依赖的粮食来源，使人口增长；最终过多的人口迁移到新的土地。
Excess mortality, defined as a greater death rate than normal, was around 4 in 1,000, or 0.4% of the population.
该超额死亡率，是大约1000人中有4人，或占总人口的0.4%(超额死亡率是指死亡人数超过正常节率)。
Excess mortality, defined as a greater death rate than normal, was around 4 in 1, 000, or 0.4% of the population.
该超额死亡率，是大约1000人中有4人，或占总人口的0.4%(超额死亡率是指死亡人数超过正常节率)。
Population figures for elk are in excess of 30,000-the largest population of any large mammal species in Yellowstone.
麋鹿的种群数字超过了3万头——这是黄石公园里最大的一种大型哺乳动物。
An epidemic is any unusual excess amount of disease or injuries within a population.
流行病是任何在一定人群中超过一般数额的疾病或损伤。
Tax penalties for those who have families with more than a designated number of children to discourage excess population growth.
对子女超过法定数目的家庭给予税收惩罚以抑制人口的过度增长。
A thousand years ago, this was a thriving wooden metropolis with a population in excess of a million people, at a time when London's was just 80,000.
一千多年前，这里是兴旺的木建筑大都市，人口超过一百万，而当时伦敦才只有8万人。
The combination of persistently high mortality rates and a growing population means that in parts of the world the number of "excess" births is growing fast.
居高不下的死亡率加上持续增长的人口，这都意味着，在一些地区人口增长过快。
The statistics are startling and the health risks are real: Over 60% of the U. S. population is affected by excess weight.
统计学是令人吃惊的，而且健康危险是真正的：超过 60% 的美国籍的人口被过度重量影响。
The present population of business concerns grew up as a result of the cumulative excess of business births.
目前企业单位数量的增长是企业诞生积累的结果。
Studies estimate that you can explain the amount of excess weight gain in the U. S. adolescent population over the past 10 years or so with the addition of only 150 calories a day.
Gillman说，“研究估计，在过去10年中青少年人群体重增加问题可能与每天增加了150卡路里摄入有关。
Studies estimate that you can explain the amount of excess weight gain in the U. S. adolescent population over the past 10 years or so with the addition of only 150 calories a day.
Gillman说，“研究估计，在过去10年中青少年人群体重增加问题可能与每天增加了150卡路里摄入有关。
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