Such is the case in pyrrole, thiophene, and furan.吡咯, 噻酚和呋喃的情况就是这样.It'shows that the key step is the synthesis of 4 - methyl - dihydro - furan - 2 , 3 - dione.研究结果表明关键步骤为原料 4- 甲基 -2, 3- 呋喃二酮的合成.A novel furan resin w...
在这一问题上它特别参照了赫尔曼·诺丁1928年的经典之作。It specifically referenced Hermann Noordung's classic 1928 book on this subject.赫尔曼先生累了,开始想着其他的事情.Mr Hermann was tired and thinking about other things.凡是认识他的人都把 “ 问赫尔曼 ” 当作一句口头禅.For all ...
For two millennia, exogamy was a major transgression for Jews.两千年来, 异族通婚一直是犹太人的一大禁忌.Last, it analyzes the relationship between totemism and exogamy, and the three functions of exogamy.最后, 本文分析了图腾崇拜和外婚制的关系, 以及外婚制的三大功能.Exo...