According to the contrasts between the structure of PANI and that of POT, the conclusion could be made that steric hinderance effect of methyl groups in the poly-O-methylaniline is more prominent than induction effect and hyperconjugation.

比較聚苯胺和聚鄰甲苯胺的結(jié)構(gòu)可知，甲基取代苯環(huán)中的一個(gè)氫原子后6080午夜理论在线毛片，甲基對聚鄰甲苯胺的空間位阻效應(yīng)明顯大于誘導(dǎo)效應(yīng)和超共軛效應(yīng)国产嫖娼啪啪精品。

The main hinderance on our path is the reliance we place in the illusion of the importance of the activities of this life.

我們在修行道路上的主要障難就是：我們相信一種幻相，過于強(qiáng)調(diào)我們此生行為的重要性无码专区三级片免费用在线观看。

The partial substitution of acids on the triazole-ring of polymer 10 may arise from difference in acid strengths or from varying degrees of steric hinderance during protonation reactions.

在酸部分取代對三氮唑聚合物10環(huán)可能產(chǎn)生的酸強(qiáng)度的差異黄片视屏无码免费，或從不同的反應(yīng)過程中的質(zhì)子立體阻度。

To some extent it's what makes engineering interesting, but it's also a hinderance and we are going to try and address that issue.

在某種程度上這就是為什么工程學(xué)有趣的原因国产精品有限公司，但這也是一種阻礙性欧美黑人巨大videoshd，我們正在嘗試改正這個(gè)問題。

The peaceful rise of the China will be neither hinderance/interence nor a threat to any country.

中國的和平崛起不會妨礙任何國家91久久久无码国产，也不會威脅任何國家黄色操B免费视。

hinderance factor：障礙因子

希耳渦旋管 Hilsch vortex tube | 障礙因子 hinderance factor | 受阻擴(kuò)散 hindered diffusion