vital part

基本解释

You are a vital part of this world.
你是这个世界的一个重要部分。
Infrastructure improvement is a vital part of China's development agenda, particularly in the inland provinces.
改善基础设施（尤其是内陆省份）是中国发展议程的一个重要部分。
And yet, for all their faults, and for all of the frustration they have created, this week’s sanctions are a vital part of holding Iran to account for nuclear proliferation.
可是，对于他们的所有错误和他们已经造成的所有挫败来讲，本周的制裁，是坚持让伊朗解释其核扩散原因的至关重要的部分。

The high court has also agreed to hear a case involving part of an anti-terrorism law the government says is a vital part of its effort to fight international terrorism.
It emerged from a unique history in which chance and accident often played a vital part.
它出现在这段独特的历史中,其中机遇和偶然性扮演了重要角色
耶鲁公开课 - 古希腊历史简介课程节选
It's very important because it provides-- does provide energy but it helps with muscle building and with the manufacturing the body does of its own proteins, and therefore, is a vital part of the diet.
蛋白质非常重要,因为它能提供,的确能提供能量,但它也能帮助肌肉塑形,参与身体内自身蛋白的合成,因此是饮食中不可或缺的组成部分
耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Each of these neighborhoods is a vital part of this city, as is every single child.
WHITEHOUSE: First Lady Michelle Obama Speaks at Meeting to Address Youth Violence