Natural Change of Population 人口自然变动情况
mechanical change of population 人口机械变动
change of population structure 人口结构变迁
the change of population structure 人口结构变迁
change of distribution of population 人口分布变迁
statistics of population change 人口变动统计
spatial types of population change 人口变动地域类型
The problems of excessive energy consumption, climate change and population growth have been described in a book by the American writer Thomas.
美国作家托马斯的一本书中描述了能源消耗过度、气候变化和人口增长的问题。
Organic agriculture is a relatively untapped resource for feeding the Earth's population, especially in the face of climate change and other global challenges.
有机农业是一种相对而言尚未开发的资源,可以用来养活地球上的人口,尤其是在应对气候变化和其他全球性挑战的情况下。
Experts say drip irrigation is an innovation whose importance is growing, as climate change and rising population strain water supplies in many parts of the world.
专家表示,随着气候变化和人口增长对世界上许多地区的水资源供应造成压力,滴灌这种创新做法显得越来越重要。
"Whether or not they blame Karzai for that personally, I think that there is a general sense among significant parts of the population that it may be time for a change.
VOA: standard.2009.08.03
And so this is a substantial change in the interaction of a microorganism with a population, right?
所以这是微生物和人类,之间关系的一个巨大改变,对吧
If X is the number of cells, then the rate of change of X, dX/dt, the rate of change of the cell population, how fast division is taking is proportional to the number of cells I have.
如果X是细胞数目,那么X的改变率就是dX/dt,就是细胞数目的改变率,分裂的速度有多快,和细胞数量呈比例关系
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