At the turn of the century, the population problem perplexes Russia.
世纪之交，人口问题困扰着俄罗斯。
The population problem and the problems of resources, environment, and grain will be the the chief problems man is to confront in the 21 century.
人口问题与资源、环境、粮食等问题将是21世纪人类社会面临的主要问题。
The population problem and the problems of resources, environment, and grain will be the the chief problems man is to confront in the 21 century.
人口问题与资源、环境、粮食等问题将是21世纪人类社会面临的主要问题。
应用推荐