one third of

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。
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。
Generally speaking, more than one third of personal incomes in China will be banked, far higher than the 5% in America.
一般来说，中国人将收入的三分之一以上存进银行，远远超出美国人5%的比例。

It says that nearly one third of about eight hundred bird species in the United States are threatened in some way.
actually our third, but the second one we're going to talk about in terms of formal charge, which is thionyl chloride.
实际上是第三个，但它是第二个,形式电荷的例子，也就是亚硫酰氯。
麻省理工公开课 - 化学原理课程节选
About one-third of Southern white families at one time or another had at least a toehold in slave ownership.
大约三分之一的南方白人家庭,在某一段时期至少都拥有过奴隶
耶鲁公开课 - 美国内战与重建课程节选

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