One key driving force behind bee destruction in Europe and North America has been a type of mite, the varroa destructor pest, which attacks bees and that beekeepers struggle to control, Neumann said.
欧洲、北美的蜜蜂面临的毁灭背后一个关键性的驱动力是一种叫做瓦螨的小虫，它们向蜜蜂发起进攻，而养蜂人则极力想要控制它们，诺依曼说。
“This row is a north to south transect along the East Coast, ” he said one day recently, pointing to tubes containing samples collected at sites from Cape Cod to Key West.
“这一组沙是东海岸沿岸从北至南的样本。”最近的某天他指着一些试管说。
QinetiQ North America will provide the electric drive propulsion or E-X Drive system for the GCV. This is a key component of the hybrid-electric drive system, according to a BAE press release.
北美QinetiQ将为GCV提供电力驱动推进或前驱动系统，这是混合动力驱动系统的关键组成部分。
The FWRPP is an important consisting part of the North river valley flood_protection system and a key installation to guarantee the people's life_property safety.
飞来峡水利枢纽是北江流域防洪体系的重要组成部分，是保证珠江三角洲人民生命财产安全的关键设施之一。
The North-to-South Water Diversion Project is a large-scale inter-basin water transfer project, and the reasonable determination of the volume of water diversion is a key problem.
北水南调工程是东北地区一项大型的跨流域调水工程，优选调水量是其关键问题之一。
Even the Danjiangkou Reservoir, a key component of the south-to-north water diversion project, saw its water levels drop drastically to 4.23 meters below its dead water level on Saturday, he said.
他说，即使是丹江口水库——南水北调工程的重要组成部分，其水位周六也降到较死水位低4.23米的水平。
Even the Danjiangkou Reservoir, a key component of the south-to-north water diversion project, saw its water levels drop drastically to 4.23 meters below its dead water level on Saturday, he said.
他说，即使是丹江口水库——南水北调工程的重要组成部分，其水位周六也降到较死水位低4.23米的水平。
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