three简单

Fast trains can cover the 500km between the two cities in three hours.

高速列车三小时就能跑完两城之间500公里的路程。

“Insects that today are a minor problem may become a major problem if they can produce three or four generations in a year,” says forest ecologist John Stanturf.

森林生态学家约翰·斯坦图夫说：“如今只是小问题的昆虫，如果一年能繁殖三四代，就可能变成大问题。”

Covering about two and a half acres, Pavlopetri’s three main roads [connected] some 50 rectangular buildings, all of which had open courtyards.

帕夫洛彼特里占地约两英亩半，三条主干道{{18}}了大约50座长方形建筑，这些建筑都带有露天庭院。

An infant born to a hunter-gatherer society could have more than ten caregivers — this contrasts starkly to nursery settings in the UK where regulations call for a ratio of one carer to four children aged two to three.

出生在狩猎采集社会的婴儿可能有十多位照料者——这与英国的托儿所形成了鲜明对比，英国的规定要求，对于两到三岁的儿童，照料者与儿童的比例为一比四。

While around three quarters of Scottish homes are built from Scottish timber, the use of home-grown wood in England is only around 25 percent.

苏格兰约四分之三的住宅是用苏格兰木材建造的，而英格兰本土木材的使用率只有25%左右。

One in three Americans who are at least 40 have or plan to have a job in retirement to prepare for a longer life, according to a survey conducted by Harris Poll for TD Ameritrade.

根据哈里斯民意调查公司为德美利证券所做的一项调查，在40岁及以上的美国人中，每三人就有一人在退休后有工作或计划找工作，以便为更长的寿命做准备。

In one example, an individual — acting as author, editor, and consultant — was able to use at least 15 journals as citation providers to articles published by five scientists at three universities.

在一个例子中，一个人身兼作者、编辑和顾问三职，竟能利用至少15种期刊为三所大学的五位科学家发表的文章提供引用。

The percentage of retirement-age people in the labor force has doubled over the past three decades.

在过去三十年里，劳动力中达到退休年龄的人所占的比例翻了一番。

They chose this particular behavior for three reasons, according to study co-author Eric Schwitzgebel, a philosopher at the University of California, Riverside: students’ attitudes on the topic are variable and unstable, behavior is easily measurable, and ethics literature largely agrees that eating less meat is good because it reduces environmental harm and animal suffering.

据该研究的合著者、加州大学河滨分校的哲学家埃里克·施维茨格贝尔说，他们选择这一特定行为有三个原因：学生对这一话题的态度多变且不稳定；这种行为很容易衡量；伦理学文献大体上认同少吃肉是好的，因为这能减少环境危害和动物痛苦。

The growth of higher education manifests itself in at least three quite different ways, and these in turn have given rise to different sets of problems.

高等教育的增长至少表现为三种截然不同的方式，而这些方式又相应地引发了不同的问题。

When a faculty or department grows from, say, five to 20 members within three or four years, (49) and when the new staff are predominantly young men and women fresh from postgraduate study, they largely define the norms of academic life in that faculty.

当一个学院或系在三四年内从比如说5名成员增加到20名，(49) 并且新进员工主要是刚完成研究生学业的年轻男女时，他们在很大程度上决定了该学院学术生活的规范。

Mr. Roth has three community-college students enrolled in a work-placement program, with a starting wage of $13 an hour that rises to $17 after two years.

罗斯先生招收了三名社区大学的学生参加一个实习项目，起薪为每小时13美元，两年后涨到17美元。