氯化氢是离子化合物吗:求助！谁能给我分析一下这个句子啊

作为speeches 的对象
made countless speeches to his employees，
that have been preserved on tape,是对speeches的定语从句
他不仅发表了40多本描写洞察商业及其商业的社会地位的书刊，还在公开场合对他的员工做了无数的演讲，演讲都录音保留了下来。

这是个并列的句子."不但...而且...."
在"不但...."中又有一个并列句,其中有一个and
同样在"而且..."中也有一个并列句(to his employees that have been preserved on tape.)",用and连接.

to his employees 相当to one’s surprise
表心态，伴随，that have been preserved on tape是定语that 代employees

in public forums 和 to his employees.. 是并列的，to只是表示他speeches的对象而已，不是楼上讲的目的状语。

他也做了无数次演讲，无论是在公众论坛里，还是被录成磁带放给他的雇员听。

he also made countless speeches是句子的主体部分(他做了无数次的演讲),后面的两个句子都是起修饰成分的状语,第一个分句in public forums, 连起来看就是他在公共讲坛做了无数次的演讲,后一个分句to his employees that have been preserved on tape,把它和主句连起来看就明白了:he also made countless speeches to his employees that have been preserved on tape(他也给他的雇员以录音磁带的形式做了无数的演讲).

所以整个句子就是分别说了他做演讲的两种不同情况.

说明speeches的啊
他做的演讲一种是to his employees，还有一种是in public forums，它们用and连接，这些speeches都have been preserved on tape，tape又和books并列的，都是he publiched。