Prof Cheng agrees the Pisa results reflect a broad cross section.
程教授认为Pisa的测试结果能反映了大致情况。
However, Cheng and colleagues are not the only scientists with a theory.
然而，Cheng和他的同事们并不是唯一的一群对这个现象拥有理论解释的科学家。
They came to a house in which lived a man named Chen Cheng and his family. The whole family was crying.
他们来到一户叫陈澄的家中，见全家人正痛哭流涕。
It was a far cry from just a month ago, when no one even bothered to give Cheng a second look - let alone a piece of bread.
这简直是天壤之别，一个月之前，甚至没有人肯多看程一眼，更不用说给他一片面包之类的了。
What Cheng and co have started is a cat and mouse game just like those that plague the antivirus and spam filtering industries.
对于程和他的合作者来说这是一个猫鼠游戏，就像疫症和抗菌素、垃圾邮件和邮件过滤行业一样。
Zhun Jun said that his army was to attack the southwest part of Wan Cheng and then created a big display to mislead the Yellow Scarves Rebellion.
这时朱隽放出消息说要攻打宛城的西南角，并且大造声势以便蒙蔽黄巾军。
"It is a new form of strike - a very symbolic event," said Liu Cheng, a professor at Shanghai Normal University and an outside adviser in the drafting of the 2008 Labour law.
“这是一种新形式的罢工，一个极具象征性的事件，”上海师范大学教授刘诚表示，他曾在2008年《劳动法》起草过程中担任外部顾问。
We were dressed for train travel, not mountaineering: Liu Yang was in leather thigh-high boots; Li Cheng wore a white furry hat in the shape of a polar bear, PAWS reaching down to warm her chin.
我们这身打扮是来坐火车的，而不是来登山的：刘杨穿着长皮靴；李诚戴着一顶北极熊形状的抓毛帽子，北极熊的爪子还伸下来为她的脸颊御寒。
At the same time, Cheng describes the BRICS as a very loose group of countries that may find it difficult to forge consensus because of differing basic interests.
但与此同时，郑宇硕认为金砖五国是一个非常松散的组合，在基本利益上存在差异，因此很难形成重要共识。
His hotel, the Cheng Pao, is already a popular stop for Chinese tour groups, but he hopes a new influx will increase occupancy rates above the current 60 percent to 70 percent.
他的旅馆，取名叫晨跑，已经是大陆旅游团喜爱的落脚点，但他仍希望有新的客流，能够使入住率从现在的60%提高到70%。
This was popular because the writer put onstage the aspirations of a young woman,” Professor Cheng said.
“这出戏大受欢迎是因为作者将一位少女对幸福生活的追求搬上了舞台。”郑教授说。
"This was popular because the writer put onstage the aspirations of a young woman," Professor Cheng said.
“这出戏大受欢迎是因为作者将一位少女对幸福生活的追求搬上了舞台。”郑教授说。
Cheng remembers a story he heard as a teenager.
程恩华回忆起在年轻时听到的一个故事。
Cheng Guorong lived unknown on the streets of Ningbo about half a month ago.
在半个月之前，程国荣还默默无闻地生活在宁波街头。
Bed covers: Whenever she checks into a hotel, Ms. Cheng says the first thing she does is pull off the bed cover.
没用的床罩：郑志雯说，每次入住酒店的时候，她做的第一件事情就是把床罩扯掉。
The affiliate sold a piece of its stake in Cheng Da this summer, booking a tidy profit.
这个计划在这个夏季售出了它持有的部分辽宁成大的股票，登记了一笔可观的收益。
"Live in a simple house, eat simple foods and keep simple relationships with local people, " Cheng says. "That's the very kind of lifestyle that goes well with nature.
“住在普通的农舍里，吃五谷杂粮，和当地人保持淳朴的关系，”程恩华说，“这就是一种顺其自然的生活方式。”
"I'd been dreaming of a rural life for decades, but my work hampered me," Cheng says. "Cancer brought me the chance to start living all over again.
“我一直梦想能在乡村生活，但工作让我不能离开，”他说，“是这场癌症给我带来了重新生活的机会。
But if you say 'big risk,' that's definitely not appropriate, "says a representative at Liaoning Cheng Da's Dalian headquarters, Yu Zhanyang."
但如果你称之为'大风险'，那绝对不合适，辽宁成大大连总部的代表，余战阳(音)说。
Some analysts suggest the yuan could become convertible on the capital account by 2015, but Cheng sounded a wary note.
一些分析员指出，人民币将有可能在2015年之前，成为在资本账户上能够自由兑换的货币。但是成发出了警告。
By the statistics, Cheng stands a better chance than most. Wuhan University of Technology, although not one of the nation's "key schools, " ranks in the second tier.
尽管武汉科技大学不是国家重点大学之一，排名也属二流，但据统计，程晓辉比更多人拥有优势。
Cheng Yunyun, meanwhile, is still going to those match-making parties because she thinks they're an effective way to meet many people in a short time.
与此同时，程云云(音译)还在参加各色联谊。因为她认为，这是短时间内结识更多人的捷径。
In 1998, Cheng, then 64, was working night and day as a research specialist at the Ministry of Land and Resources.
1998年，64岁的程恩华还在国土资源部夜以继日地进行研究工作。
For example, the popular Renren.com game "Happy Farm" was developed by a group of post-80s youngsters, including COO (chief operating officer) Xu Cheng.
拿校内网（现改名为"人人网"）上流行的组件“开心农场”为例，该游戏是由一群80后青年研发。包括首席运营官（COO）徐成就是其中一员。
"It would be great if I could meet a guy that I wanted to spend the rest of my life with," says Cheng.
程说：“如果能遇见一个我愿意托付终生的人当然很好。”
"It would be great if I could meet a guy that I wanted to spend the rest of my life with," says Cheng.
程说：“如果能遇见一个我愿意托付终生的人当然很好。”
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