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文章来源:admin    时间:2019-11-06

  Chinese scientists have developed a new method to control the population of mosquitoes, the Science and Technology Daily reported Monday.   《科技日报》周一报道,中国科学家发现一种控制蚊子数量的新方法。   Scientists from the Sun Yat-Sen University have conducted a four-year field test in controlling the population of the Asian tiger mosquito (Aedes albopictus), one of the world's most invasive mosquito species that carries dengue, the Zika virus and many other devastating1 diseases.   Through microinjection and radiation, scientists sterilized2 male mosquitoes and released them into the environment to mate with wild female mosquitoes, resulting in no offspring and a declining population over time. They also exposed male mosquitoes to a strain of Wolbachia bacteria, which rendered the females sterile3.   With this method, the mosquito population has been almost eliminated in the field test, with the annual number of wild mosquito species decreasing by about 83 to 94 percent. No mosquitoes were detected for up to six weeks.   The research was published in the journal Nature.   This successful field trial demonstrated that the technique could be used to establish a protected area free of mosquito-borne disease and mosquito harassment4, the report cited Xi Zhiyong, the leading researcher as saying.
1 devastating      adj.毁灭性的,令人震惊的,强有力的 参考凯发k8娱乐官网例句:
  • It is the most devastating storm in 20 years.这是20年来破坏性最大的风暴。
  • Affairs do have a devastating effect on marriages.婚外情确实会对婚姻造成毁灭性的影响。
2 sterilized      v.消毒( sterilize的过去式和过去分词 );使无菌;使失去生育能力;使绝育 参考例句:
  • My wife was sterilized after the birth of her fourth child. 我妻子生完第4个孩子后做了绝育手术。 来自辞典例句
  • All surgical instruments must be sterilized before use. 所有的外科手术器械在使用之前,必须消毒。 来自辞典例句
3 sterile      adj.不毛的,不孕的,无菌的,枯燥的,贫瘠的 参考例句:
  • This top fits over the bottle and keeps the teat sterile.这个盖子严实地盖在奶瓶上,保持奶嘴无菌。
  • The farmers turned the sterile land into high fields.农民们把不毛之地变成了高产田。
4 harassment      n.骚扰,扰乱,烦恼,烦乱 参考例句:
  • She often got telephone harassment at night these days.这些天她经常在夜晚受到电话骚扰。
  • The company prohibits any form of harassment.公司禁止任何形式的骚扰行为。

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