main portion

基本解释

The main portion of the Potala contains the White Palace and the Red Palace.
布达拉宫主体建筑为白宫和红宫。
The main portion of your essay will consist of arguments to support and defend this belief.
你论文主体的内容应该就是提出论据来支持你的论点。
Additionally, pages should be less than 100KB to break a page up and to keep descriptive content at the top main portion of the page.
此外，为分割页面和保留页首主要部分的描述性内容，页面应小于 100KB。

But the main portion of the agreement dealt with finances and from the looks of it Tiffany very much wanted Peretti to stay, according to a document filed with the U.S. Securities and Exchange Commission.
FORBES: The Tiffany-Peretti Deal Could Be Worth $436 Million
Its main role, it seems, is to produce a portion of the seminal fluid that acts as a delivery vehicle for sperm.
FORBES: Men, Cancer & Hope
The main thrust - at least of the Pentagon leaders' portion - was telegraphed in an op.ed. published in the Wall Street Journal last week by Secretary of Defense Robert Gates.
CENTERFORSECURITYPOLICY: The President's new clothes