Question

请问这句的句子成分是？越详细越好，谢谢。

which is what we're primarily going to focus on here
即这门课程的核心内容

Answer 1

你好

which is what we're primarily going to focus on here

主句部分

主语：which 

谓语：is

从句部分 (表语从句what we're primarily going to focus on here）

连接词：what

主语：we

谓语：are going

宾语：to focus on here

状语：primarily

保证准确率~

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Answer 2

大体（即外层）是一个主语从句，is后又是一个表语从句。