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The researchers recently looked at more than 600 crop pests from around the world.
科學家最近研究了世界各地的600多種農(nóng)作物害蟲。
These included fungi, such as wheat rust, which is devastating harvests in Africa and the Middle East;
其中包括引發(fā)小麥銹病的病菌，這種病菌嚴重影響了非洲和中東地區(qū)的收成；
insects like the mountain pine beetle that's destroying trees in the U.S.; as well as bacteria, viruses and microscopic worms.
還有昆蟲，如嚴重破壞美國樹木的山松甲蟲；此外還有細菌、病毒和一些微型蠕蟲。
They found that over the past 50 years, these destructive species have been on the move.
科學家們發(fā)現(xiàn)，過去的五十年里這些破壞性的生物在不斷擴散。
On average, they're spreading 3km every year, shifting north and south towards the poles.
它們的擴散速度達每年3公里，朝南北兩極蔓延。
The scientists say this correlates with warming temperatures, allowing the pests to take hold in areas that were once too cold for them to live in.
科學家稱這一發(fā)展與全球變暖有關(guān)，這些害蟲已經(jīng)入侵到它們以前因溫度過無法生存的地域。
Currently, between 10% and 20% of the world's crops are lost to pests— and the team warns that rising global temperatures could make the problem worse.
目前，因蟲害而損失的糧食達10%-20%。研究小組發(fā)出警告，稱全球變暖可能使問題繼續(xù)惡化，
The researchers say that improved surveillance of the problem is needed.
并表示應該加強對這一問題的監(jiān)控措施。
Question 3.What is the news report mainly about?
3.該新聞報道的主要內(nèi)容是什么？
Question 4.What is the probable proportion of crop lost to pests?
4.去年因蟲害而損失的糧食可能有多少？
譯文屬可可原創(chuàng)，僅供學習和交流使用，未經(jīng)允許不得轉(zhuǎn)載
