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Diets all around the world have become increasingly similar.
全世界的日常飲食已經變得越來越相似。
That's not good news for either human health or for crop health, according to a study in the Proceedings of the National Academy of Sciences.
但這對人類和農作物健康都不是個好消息。一項在《國家科學院院刊》雜志上發表的研究得出了上述結論。
Scientists analyzed diet trends over the past 50 years.
科學家們對過去50年來的飲食趨勢進行了分析。
Overall, people are eating more, and are getting more of those calories from meat, oil and grains.
總體上看，人們吃的越來越多，并且從肉類、油脂以及谷類中攝取的能量增多。
But the diversity has gone down.
但食物種類的多樣化則呈現下降趨勢。
Wheat, rice and corn have gotten even more important.
小麥、水稻和谷類已經變得十分重要。
Soybeans and sunflower and palm oil have also become larger players.
大豆油、葵花籽油和棕櫚油也已經變得屢見不鮮。
Meanwhile, crops such as sorgum, rye and cassava have dropped in relative importance.
同時，高粱、黑麥和木薯這些農作物已經變得相對重要。
The authors say the trend towards the Western diet contributes to obesity and heart disease，as well as a diminished diversity in oral and gut microbes, which is harmful to health.
該文章作者表示，朝西方飲食轉變的這種趨勢使人們更易患肥胖癥和心臟病，同時口腔和腸道內有益菌群的多樣性也會有所下降，這對人類健康會造成危害。
Perhaps equally important, the reliance on a small group of foods puts the crops themselves at risk from diseases or climate change.
或許是對雙方都很重要，作為食物對一小部分農作物的依賴使得農作物本身抵抗疾病或氣候變化也有了風險。
Study co-author Andy Jarvis says that a more diverse global food system is critical.
而該文章的合著者安迪?賈維斯表示更多樣化的全球食物系統非常關鍵。
Quote, “This is the best way, not only to combat hunger, malnutrition, and over-nutrition, but also to protect global food supplies against the impacts of global climate change.”
這里引用道:“這是最好的一種方式，不僅有利于抵抗饑餓、營養不良以及營養過剩等問題，而且對保護全球食物供應鏈體系應對全球氣候變化帶來的深遠影響也是大有助益。”
