官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

AGRICULTURE REPORT - Controlling Locusts with Technology

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
PDF节目文稿 PDF节目文稿  MP3节目录音 MP3节目录音 
文章正文
同步字幕

This is the VOA Special English AGRICULTURE REPORT.

Desert locusts are a threat to agriculture in many developing countries. Large numbers of locusts can destroy crops in a few hours. Locusts can eat as much food in one day as two-thousand-five-hundred people. The insects also move quickly. They can travel more than one-hundred kilometers in a day.

The U-N Food and Agriculture Organization says desert locusts are found in twenty-five countries. The countries cover an area of sixteen-million square kilometers, from west Africa to India.

The local Ministry of Agriculture generally is responsible for locust control. In some areas, international organizations offer assistance. Chemicals to control locusts can reduce the number of insects. However, some locusts have developed a resistance to the chemicals. Also, chemicals can be costly and harm the environment.

Desert locusts caused major crop damage between Nineteen-Eighty-Seven and Nineteen-Eighty-Nine. Locust experts are preparing for the next major attack.

Presently, teams investigate and collect information about the location of locusts. They send their reports to a national office. From there, the reports are sent to F-A-O headquarters.

Recently, United Nations officials described a method to ease the work of people studying the insects. The method involves satellites in earth orbit and computers. F-A-O officials say teams now can use satellites in a global positioning system, or G-P-S. It provides position information to both military and civilian users all over the world. Researchers studying locusts can identify their position to within ten meters.

The team connects the G-P-S to a small hand-held computer. The computer has a program for collecting information about locusts. At the end of the day, the team connects the computer to a special radio in a vehicle. The radio sends the information to the national office through a special device.

F-A-O locust expert Keith Cressman says desert locust attacks can begin suddenly. So it is important to be able to act quickly. He says this technology will help send information quickly and correctly. The new system should help experts warn countries threatened by desert locusts. It also should reduce the amount of chemicals needed to kill the insects.

This VOA Special English AGRICULTURE REPORT was written by George Grow.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台