From < The aves, and ave nots > 摘自《经济学人》 Feb 23rd 2006

While the presence of the virus in any form is a concern, Nigeria, Egypt and India face bigger problems coping with dense farmed avian populations, and they are less well equipped to deal with them. （1）More significantly, it is increasingly apparent that the real and most immediate issue is to what extent wild birds, or humans themselves, are responsible for the infection's spread in poultry.

A research paper in Proceedings of the National Academy of Sciences, published online on February 10th, shows that the H5N1 virus has persisted in its birthplace, southern China, for almost ten years and has been introduced into Vietnam on at least three occasions, and to Indonesia. （2）The authors suggest that such transmissions are perpetuated mainly by the movement of poultry and poultry products, rather than by migrating birds.

new words

perpetuate     v. 使永存,使不朽
These measures will perpetuate the hostility between the two groups. 采取这些措施势必使那两集团永远对立。

poultry     n. 家禽

≡参考答案：≡

更重要的是，那些实际并迫切的问题越来越明显是野生动物或者人类应在何种程度上对家禽中传播感染负责任。 作者认为这类病毒的传送被保持下来，主要是通过家禽和家禽制品的运输而不是通过鸟类迁徙。