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1·Low pay has long been acknowledged as a major issue in the early childhood field.

长期以来，低工资一直被认为是儿童早教领域的一个主要问题。

2·With production anticipated to increase by 25% between now and 2030, sustainable energy sourcing will become an increasingly major issue.

从现在到2030年这段时间，石油产量预计将增加25%，而可持续能源的来源将成为一个日益重要的话题。

3·The protection and improvement of the human environment is a major issue which affects the well-being of peoples and economic development throughout the world.

人类环境的保护和改善是影响到世界人民幸福和经济发展的主要问题。

4·Hunting was not a major issue.

狩猎不是一个主要问题。

5·Scalability is a major issue.

可伸缩性是一个主要问题。

6·Data cleaning is a major issue.

清理数据是个大问题。

7·In China, recycling is a major issue.

在中国针筒的回收是个大问题。

8·Wastewater treatment is a major issue.

而污水处理是一个重要问题。

9·Fresh water is likely to be a major issue.

洁净的水可能是一个主要问题。

10·The major issue of contention concerns property rights.

主要的争端还是产权问题。