He knew that Karl could be an implacable foe.

他明白可能会成为他死敌。

Karl gave a vulpine smile.

出了狡黠微笑。

A new method for determination of water content in ammonium-uranyl tricarbonate by Karl -Fisher reagent titration is described in this paper.

本文叙述了·费休试剂滴定法测定三碳酸铀酰铵中方法,详细研究了测定各种条件,特别是铀、铵和碳酸根干扰情况。

Chapter One reviews in a diachronical manner the development of the class theories, with an emphasis on the class theories of Karl Marx and Friedrich Engels.

第一章回顾了阶级理论历史发展，重点析了马克思和恩格斯阶级理论。