例句與造句

1. Since a pentode presents a fairly constant current sink , trying to power it from a constant current source will be fairly unsuccessful , sort of like the unstoppable object hitting the immovable object
   因?yàn)槲寮壒鼙旧砭捅憩F(xiàn)得類似恒流陷阱（意思是消耗恒定的電流） ，試圖用恒流源驅(qū)動(dòng)五級管只會(huì)是個(gè)失敗，就好像試圖用一個(gè)停不下來的物體去打擊一個(gè)不可移動(dòng)的物體。
2. The paper reviews the three pentodes about urban e - government research , narrates the research progress of service functions , sustainable ability , spatial distribution and models , development motives and key functions on urban e - government functionality from the view of home scholars
   摘要回顧國內(nèi)城市電子政務(wù)研究的三個(gè)時(shí)期，評述國內(nèi)學(xué)者對我國城市電子政務(wù)的服務(wù)職能，可持續(xù)發(fā)展能力，空間格局影響，模型，發(fā)展動(dòng)力與核心功能5個(gè)方面的研究進(jìn)展。
3. It's difficult to find pentode in a sentence. 用pentode造句挺難的