基本解釋立體位阻效應(yīng)英漢例句雙語(yǔ)例句The dependence of chain scission and racemization on temperature results from molecular motion, "cage effect" and steric hindrance during recombination.分子量降低和消旋作用對(duì)溫度的依賴性，是由于分子運(yùn)動(dòng)和籠罩效應(yīng)以及重合的空間位阻效應(yīng)所致。Space steric hindrance resulted by length lateral chain and electrostatic repulsion of charged ion made the main contribution to water-reducing effect of PAA.自制PAA 系列的減水機(jī)理主要為其長(zhǎng)側(cè)鏈引起的空間位阻作用及其帶電離子的靜電斥力作用。At the same time, we have also investigated the influence of the electric effect and steric hindrance effect of the substituents to the yields and regioselectivity.同時(shí)，我們還研究了取代基團(tuán)的電子效應(yīng)和位阻效應(yīng)對(duì)反應(yīng)產(chǎn)率和區(qū)域選擇性的影響。steric hindrance effect更多例句專業(yè)釋義土木建筑工程空間位阻作用化學(xué)位阻效應(yīng)