“纳粹党的”可以翻译为“Nazi Party's” 或者 “of the Nazi Party” 。
例如：
纳粹党的标志是卐字旗。（The Nazi Party's symbol was the swastika flag. ）
我们要了解纳粹党所犯下的罪行。（We need to understand the crimes committed by the Nazi Party. 此处也可用“of the Nazi Party”结构，即We need to understand the crimes committed of the Nazi Party. 不过原句这样表达稍显生硬，更自然的说法可以是We need to understand the crimes committed during the Nazi Party's reign. ）