在种子园中,常常有某种程度的自花传粉和随后地自花授精.Self - pollination, and subsequently self - fertilisation, in orchards always takes place to some extent.在果园中,常常有某种程度的自花传粉和随后地自花授精.Self - pollination, and subsequently self - fertilization, in ...
The AC complex impedance method is widely used to charactrize electronic materials.ac复阻抗方法已广泛地用于表征电子材料.A new Capacitive - Gap - Coupled ( CGC ) band - pass filter based on SIR ( Stepped Impedance Resonators ) is presente...