請問怎麼翻 of ....of??求解?

We are intentionally leaving out of this chapter features of C that are important for writing bigger programs.
= In this chapter, we are intentionally leaving out of features that are important for writing bigger programs of C.
在此一章中，我們刻意將C語言中有關編寫大型程式所必要的功能排除在外。

leaving out of this chapter 排除於本章之外
將什麼排除在外? features of C
什麼樣的features? that are important for writing bigger programs

of-----of 屬於,
我們是故意離開屬於本章功能C;
那麼便可編寫更重要更大的程式.