Congress has obstructed efforts to create a more straightforward visa for agricultural workers that would let foreign workers stay longer in the u.s. and change jobs within the industry.
国会阻碍了为农业工人创建更简单签证的努力，这种签证将允许外国工人在美国停留更长时间，并在该行业内更换工作。
As fewer such workers enter the country, the characteristics of the agricultural workforce are changing.
随着越来越少这样的工人进入该国，农业劳动力的特征正在发生变化。
With the global population predicted to hit close to 10 billion by 2050, and forecasts that agricultural production in some regions will need to nearly double to keep pace, food security is increasingly making headlines.
随着全球人口预计到 2050年将达到近 100亿，以及一些地区农业产量需要几乎翻倍以保持同步的预测，粮食安全问题正日益受到关注。
Regenerative products could be a hard sell, because the concept is tough to define quickly, says Julie Stanton, associate professor of agricultural economics at Pennsylvania State University Brandywine.
宾夕法尼亚州立大学布兰迪葡萄酒分校的农业经济学副教授朱莉·斯坦顿表示，再生产品可能难以推销，因为这一概念很难迅速明确定义。
The size or regularity of markets can vary from season to season, depending on the area's agricultural calendar, and you’re likely to find different produce on sale at different times of the year.
市场的规模或规律性可能因季节而异，取决于该地区的农业日历，你可能在一年中不同时期发现不同的农产品在出售。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。