自1999年病毒输入美国以来，现在它已蔓延并扎根于从加拿大到委内瑞拉的广大区域。
Since its introduction in 1999 into USA, the virus has spread and is now widely established from Canada to Venezuela.
不过研究者无疑好奇相对于娇惯它们的农田为何这些特殊的植株能够设法使自己扎根到类似如停车场周边这样的地方。
But researchers are obviously curious about how these particular plants managed to make it in places like the edges of parking lots rather than pampered fields.
布什的年代已经使美国的全球形象跌入谷底，从欧洲的首都城市到阿拉伯的街巷，反美情绪已经在全球扎根。
The Bush era had produced a dramatic decline in America's global image, with anti-Americanism taking root around the world, from European capitals to the Arab street.
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