Years of experience have afforded him the chance to detect little-known warning signs and symptoms like the four he addresses.

多年的经验让他有机会观察到很难察觉到的示警标志和症状，就像他强调的那四种。

youdao

He spent four years studying pharmacy.

他花了4年时间学习药剂学。

《柯林斯英汉双解大词典》

He then proceeded to teach himself geology, and when he was twenty-four, he went to work for the company that was excavating the Somerset Coal Canal in the south of England.

后来，他又自学了地质学；24岁的时候，他开始为那家挖掘英格兰南部的萨默塞特煤炭运河的公司工作。

youdao

In nineteen forty-four he began work on a project in Mexico financed by the Rockefeller Foundation.

VOA: special.2009.09.22

In a help session what he might do typically is solve between four and eight problems that illustrate the key principle being talked that week.

在帮助课程中他一般会,解决4到8个问题,来阐明那一周教的关键原理。

麻省理工公开课 - 媒体、教育、市场课程节选

When World War One began he was seventy-four.

一战开始的时候他已经七十四岁了。

耶鲁公开课 - 现代诗歌课程节选

At age four he could hold a 7-pound barbell in each outstretched hand, according to the New England Journal of Medicine.

FORBES: Bioengineering The Perfect Athlete

Balotelli's first Premier League goals in November 2010 were overshadowed by a red card, the first of four he would go on to receive during his City career.

CNN: January 31, 2013 -- Updated 1247 GMT (2047 HKT)

For four years he presented Start the Week on Radio Four before deciding that he didn't like getting up that early in the morning.

BBC: [an error occurred while processing this directive]