one third

基本解释

Forest fires occur in the park each year; in the large forest fires of 1988, nearly one third of the park burnt.
该公园每年都会发生火灾；1988年的大森林火灾几乎烧掉了黄石公园将近三分之一的面积。
Around one third of our meals should be based on carbohydrate, with roughly one half of these grains being whole.
我们每餐食物应当差不多有三分之一是碳水化合物，大概有一半谷物食品为全麦的。
Theoretically, they could still be used for chewing, but in one third of people, they can come in sideways, impacted, or can cause pain and infection.
理论上来说，它们现在仍然可以用于咀嚼，但是大约三分之一的人的智齿从侧面萌出，就可能会导致疼痛和感染。

It says that nearly one third of about eight hundred bird species in the United States are threatened in some way.
So, one plus three is four, four sixths, which leaves two sixths, or one third.
加上3是4，六分之四，还剩六分之二，也就是三分之一。
麻省理工公开课 - 固态化学导论课程节选
And the third one I want to point out is, whether this is an interpreted versus a compiled language.
我想说的第三件事情是，这个语言是编译语言,还是解释语言。
麻省理工公开课 - 计算机科学及编程导论课程节选

The Consumer Reports data covered almost 500 physician practices, one third of which were pediatric practices.
FORBES: Toasters, Blenders, and Physician Reviews-The "New" Consumer Reports