久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

English 中文網 漫畫網 愛新聞iNews 翻譯論壇
中國網站品牌欄目(頻道)
當前位置: Language Tips> Audio & Video> 新聞播報> Special Speed News VOA慢速

Pretty flowers lead two scientists to a discovery

[ 2010-09-14 11:18]     字號 [] [] []  
免費訂閱30天China Daily雙語新聞手機報:移動用戶編輯短信CD至106580009009

This is the VOA Special English Agriculture Report.

Not all research begins with a plan. Some studies begin by accident. Meredith Schafer says that is what happened with her and Cynthia Sagers.

Cynthia Sagers is a biology professor at the University of Arkansas. Meredith Schafer is a graduate student.

They were traveling in the state of North Dakota on a project. They noticed pretty yellow flowers.

They recognized them as canola. Farmers grow canola for seeds to make cooking oil. Canola is also used for animal feed and biofuel.

But the canola plants they saw were not growing in farm fields. They were growing along the road.

The researchers decided to test the plants. They had brought along special testing papers for the project they were working on. They crushed some of the leaves in water and added the test strips.

The results showed that the weedy canola plants contained genetic changes. If a plant is genetically modified, that means its genes have been changed to produce desired qualities.

This summer, the researchers from Arkansas went back to North Dakota. This time they went on a road trip to find canola. They traveled more than 5,000 kilometers.

They stopped about every eight kilometers to count plants and take samples to test in their vehicle.

What they found, they say, was the first discovery in the United States of wild canola plants with modified genes.

Meredith Schafer presented the findings at a recent meeting of the Ecological Society of America.

The scientists found canola plants in almost half of the places they investigated. They tested a total of 288 plants. They found that 80 percent of those plants contained genes from genetically engineered canola.

Some crop plants are modified to resist damage from the chemicals that farmers spray to kill weeds. There are two proteins that can give canola the ability to resist two commonly used herbicides. One protein gives resistance against glyphosate. The other protein gives resistance against glufosinate.

Two of the plants growing in the wild showed resistance to both kinds of weed killers. Professor Sagers says canola varieties with these genetic qualities have not been released on the market. This suggests the result of wild populations reproducing on their own.

And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. You can read and listen to all of our programs and get podcasts at voaspecialenglish.com. I'm Mario Ritter.

canola: oilseed rape of a variety developed in Canada and grown in North America. It yields a valuable culinary oil 一種菜籽油

glyphosate: 草甘膦

glufosinate: 草胺磷

Related stories:

Raising goats for their hair

Housing plan threatens seed bank in Russia

Phone call about fertilizer could be a big help to Philippine rice farmers

Got baboons in your crops? Offer them a snake sandwich

(來源:VOA 編輯:陳丹妮)

 
中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883631聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。
 

關注和訂閱

人氣排行

翻譯服務

中國日報網翻譯工作室

我們提供:媒體、文化、財經法律等專業領域的中英互譯服務
電話:010-84883468
郵件:translate@chinadaily.com.cn
 
 
久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    亚洲午夜成aⅴ人片| 欧美a级一区二区| 日本久久电影网| 亚洲mv在线观看| 成人爽a毛片一区二区免费| 久久久久国产成人精品亚洲午夜| 懂色一区二区三区免费观看| 亚洲色欲色欲www| 欧美亚洲动漫另类| 日韩精品亚洲一区二区三区免费| 日韩精品专区在线影院观看| 国产精品亚洲专一区二区三区| 亚洲欧洲国产专区| 欧美日韩国产综合视频在线观看| 经典三级在线一区| 亚洲视频免费观看| 欧美一级久久久久久久大片| 国产99久久久国产精品潘金网站| 亚洲综合在线五月| 日韩精品中文字幕一区二区三区 | 91丨porny丨户外露出| 午夜精品影院在线观看| 久久久久久久久免费| 在线视频你懂得一区二区三区| 免费高清成人在线| 国产精品国产三级国产专播品爱网 | 国产美女在线观看一区| 亚洲精品综合在线| 精品国产电影一区二区| 色呦呦一区二区三区| 九九精品一区二区| 一区二区三区在线观看视频| 精品国产乱码久久久久久牛牛 | 91蜜桃在线观看| 麻豆91在线观看| 亚洲免费av网站| 久久综合九色综合97婷婷| 在线精品视频免费播放| 国产老肥熟一区二区三区| 亚洲制服丝袜一区| 国产亚洲va综合人人澡精品| 精品视频色一区| 丁香一区二区三区| 免费美女久久99| 亚洲精品水蜜桃| 国产欧美精品一区二区色综合朱莉| 欧美日韩国产免费| jizz一区二区| 国产一区在线不卡| 调教+趴+乳夹+国产+精品| 亚洲欧洲av另类| 欧美精品一区二区久久婷婷| 欧美日韩亚洲综合在线 | 亚洲免费在线观看| 国产色综合一区| 欧美一区二区三区精品| 色婷婷综合久久久中文一区二区 | 精品视频在线免费看| 国产v综合v亚洲欧| 九九在线精品视频| 日韩av中文字幕一区二区| 亚洲另类在线制服丝袜| 欧美极品美女视频| 精品国产乱码久久久久久老虎 | 紧缚奴在线一区二区三区| 午夜久久久久久久久| 亚洲精选在线视频| 亚洲欧洲av色图| 国产精品欧美久久久久一区二区| 精品欧美一区二区在线观看 | 国产欧美日产一区| 精品国产3级a| 日韩片之四级片| 欧美一区二区三区性视频| 欧美性色综合网| 一道本成人在线| av激情成人网| 成人听书哪个软件好| 国产原创一区二区| 久久黄色级2电影| 蜜臀久久99精品久久久久久9| 天堂一区二区在线| 亚洲国产成人porn| 亚洲一二三四在线| 亚洲精品国产视频| 亚洲精品视频在线看| 亚洲色图在线播放| 亚洲三级在线观看| 亚洲日本va午夜在线电影| 成人免费一区二区三区在线观看| 国产欧美日本一区视频| 国产欧美1区2区3区| 国产天堂亚洲国产碰碰| 久久久久久久久久久电影| 精品国产凹凸成av人网站| 精品免费日韩av| 久久综合久久99| 国产欧美日韩另类一区| 中文字幕电影一区| 国产精品久久久久一区二区三区共| 日本一区二区高清| 日韩美女视频19| 亚洲精品日韩综合观看成人91| 有码一区二区三区| 亚洲国产成人av网| 日本不卡中文字幕| 久久精品国产亚洲a| 精品写真视频在线观看| 国产精品一色哟哟哟| 国产suv一区二区三区88区| 成人性生交大片免费看中文| 99久精品国产| 色婷婷av一区二区三区gif| 欧美日韩一区二区三区在线| 欧美一区二区三区视频在线| 日韩精品一区二区三区在线观看| 欧美成人在线直播| 国产女人18水真多18精品一级做| 中文字幕在线观看一区二区| 亚洲激情成人在线| 日产精品久久久久久久性色 | 九九视频精品免费| 成人在线视频首页| 91蜜桃传媒精品久久久一区二区| 91福利国产成人精品照片| 欧美日韩国产片| 2欧美一区二区三区在线观看视频| 国产欧美日韩三区| 一区二区三区中文字幕电影| 日韩和欧美一区二区| 国产在线精品一区二区夜色| 成人美女视频在线看| 欧美性欧美巨大黑白大战| 777午夜精品视频在线播放| 2023国产精品自拍| 自拍av一区二区三区| 日日夜夜一区二区| 国产一区二三区好的| 不卡影院免费观看| 欧美日韩国产影片| 久久婷婷成人综合色| 亚洲人成人一区二区在线观看| 日日噜噜夜夜狠狠视频欧美人 | 老司机免费视频一区二区三区| 粉嫩av亚洲一区二区图片| 在线观看免费一区| 精品国产乱码久久久久久浪潮| 1000部国产精品成人观看| 偷拍一区二区三区四区| 丰满亚洲少妇av| 欧美日韩免费高清一区色橹橹 | 天天色图综合网| 国产成人日日夜夜| 欧美无砖砖区免费| 久久夜色精品国产噜噜av| 亚洲女女做受ⅹxx高潮| 蜜臀91精品一区二区三区| 99精品视频在线观看免费| 91精品国产色综合久久| 中文字幕制服丝袜成人av| 日韩电影免费一区| 99国产精品久久久久| 欧美变态tickle挠乳网站| 一区二区三区精品久久久| 国产一区啦啦啦在线观看| 在线亚洲欧美专区二区| 国产亚洲欧美在线| 香港成人在线视频| 成人精品小蝌蚪| 欧美va亚洲va| 亚洲综合激情另类小说区| 国产伦精品一区二区三区在线观看 | 欧美肥妇毛茸茸| 综合分类小说区另类春色亚洲小说欧美| 免费av成人在线| 色综合久久天天| 国产亚洲综合在线| 日韩国产高清影视| 91天堂素人约啪| 久久久久久久久久电影| 日本在线播放一区二区三区| 一本色道久久加勒比精品| 亚洲精品在线观看网站| 午夜久久电影网| 一本一道久久a久久精品| 久久精品日韩一区二区三区| 日本aⅴ亚洲精品中文乱码| 91久久人澡人人添人人爽欧美| 国产午夜亚洲精品不卡| 麻豆一区二区三| 欧美精品色一区二区三区| 亚洲蜜臀av乱码久久精品| 成人午夜激情视频| 久久综合久色欧美综合狠狠| 日本在线观看不卡视频| 欧美日韩精品一区二区三区蜜桃 | 国产专区综合网| 欧美一区二区三区日韩视频| 一区二区免费视频| 色综合色综合色综合色综合色综合|