How long can we continue to supplement agroecosystems with energy derived from declining fossil fuel supplies?由于矿物燃料供应量下降,我们供应农业生态系统能量能持续多久?Power Industries – Nuclear, Fossil Fuel, Combined Cycle, Cogeneration and Distri...
Ferroelectrics based on ferroelectric domains is one of the most important functional materials.铁电体是一类重要的功能材料,电畴是其物理基础.The aim paper is to lay foundation of the ferroelectrics silicon integrated microphone and micro spea...
一束耀眼的阳光从门口照射进来。A brilliant shaft of sunlight burst through the doorway.每一束螺旋光都分解成了光点。Each of the spirals of light resolved into points.他让一束电火花穿过了一团混合气体。He passed an electric spark through a mixture of gases....