接受测试的人体或器具都事先经过消毒，然后在表面覆盖上要测试的病菌，跟真实的厨房环境或一双脏兮兮的手相去甚远。
Human subjects, or countertops, in LABS are cleaned first, then covered on the surface with a target bug. That is a far cry from a typical kitchen or a pair of grimy hands.
设计了一种称之为多晶硅覆盖树技状结构的双极型微波功率晶体管。
A new device structure of silicon bipolar microwave power transistors with so called tree overlay geometry polysilicon emitter has been designed.
对普通膜与光-生双降解膜覆盖下的夏玉米试验结果进行了分析。
An experimental study dealing with summer corn covered by photo-biodegradable polyethylene film was evaluated with control.
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