Objective To study the catalytic activity of potassium bisulfate in synthesizing hexyl hexanoate.目的研究硫酸氢钾在合成己酸己酯工艺中的催化性能.Isoamyl butyrate was synthesized by using potassium bisulfate as the catalyst.以硫酸氢钾为催化剂,正丁酸和异戊醇为原料合...
The whole ship shuddered and trembled at the sudden strain.突然的拉力使得整只船剧烈颤动。His voice trembled, on the verge of tears.他声音颤抖，泪水在眼眶里打转。The leaves trembled in the trees.树上的叶子瑟瑟抖动。...
In this article, the author focuses on the anti - feudalism consciousness, tragedy consciousness and animadversion consciousness.本文主要论述了意识倾向变化中的 反 封建意识 、 悲剧意识和批判意识.Her literary criticism focuses on the way great literatu...
Perhaps the very foundational laws upholding all sensible laws are in flux.也许维持所有理性规律的特殊的基本规律都处于不断变动中.Finally, we need foundational user research that goes beyond feature development.最后, 我们需要一些在功能开发之外的[基础性使用者研究].Age stru...