本文应用三乙胺催化聚合丙炔醇.The polymerization of propargyl alcohol catalyzed by triethylamine was carried out for the first time.本文首次应用三苯膦引发丙炔醇光聚合,制得黄色粉末状、具有共轭双键结构的聚丙炔醇.The photopolymerization of propargyl alcohol inpresence of trip...
Haig noted how he "looked pinched and rather tired".黑格注意到了他“看上去消瘦，非常劳累”的样子。Its books are noted for the quality of their paper and bindings.其图书以纸质优良、封面精美而闻名。Official handouts describe the Emperor as "particularly noted as...
金星, 地球和其他行星也使水星的运动受到摄动.Venus, Earth, and other planets also perturb Mercury's motion.水星的表面有许多陨石坑,这些坑是由巨大的太空岩石撞击而成的.Mercury is covered in craters - hollows made by huge space rocks crashing into it.有时,出乎意料地,水星逆行也会有积极...