1.adolescent n.青少年
例句：The audience were mostly adolescents.
听众几乎都是年轻人。
adj.青春期的, 青少年的
例句：The adolescent period is one's best time.
青少年时期是一个人最美好的一段时光。
2.emphasize vt.强调,加强语气,着重
例句：This point cannot be over-emphasized.
这一点无论怎么强调也不过分。
He emphasized that Marxism was scientific truth.
他强调指出马克思主义是科学的真理。
3.recommend vt.推荐, 介绍, 赞许某人[某事物]
例句：Can you recommend a classmate who can take up the job?
你能不能推荐一位能承担这项工作的同学?
Can you recommend me a good book?
你能给我介绍一本好书吗?
4.largely adv.在很大程度上, 大半地, 主要地
例句：This country is largely desert.
这个国家大半都是沙漠。
His success is largely due to his own hard work.
他的成功主要是靠他自己的努力。
5.expand vt.vi.使…变大, 扩大, 扩张, 增强（尺码、数量或重要性）
例句：The ranks of the teachers are constantly expanding.
教师队伍日益扩大了。
The merchant wants to expand his business.
那个商人想扩大他的经营。
6.asbestos n.石棉
7.exception n.例外,除外;反对,异议
例句：I make no exceptions.
我不允许有例外发生。
8.absorb vt.吸收,吸引,接受,并入,使专心
例句：Small businesses are absorbed by big ones.
小公司被大公司吞并了。
1.Diarrhea kills one and a half million children each year -- one in five child deaths worldwide.
one in five是分数的一种表达方式。还可以表述为one fifth,20%等等。
2.Experts say diarrhea causes more child deaths than AIDS, malaria and measles combined.
more than combined比……加起来还要多。
3.In addition to the deaths, there's about two-point-five billion -- and I want to emphasize, about two-point-five billion cases of diarrhea among children every year.
in addition to除…之外
例句：Dr. Jones emphasizes exercise in addition to a change in diet..
约翰医生强调不仅要改变饮食还要锻炼身体。
4.Public health officials are now advised to include the rotavirus vaccine in all national immunization programs.
advise recommend虚拟语气
advise, suggest, propose, recommend等表示建议的宾语从句后要用虚拟语气。从句谓语由“should+动词原形”构成，其中的should在美国英语中通常可以省略。如：
He suggested that we should leave early. 他建议我们早点动身。
注：与动词insist相似，动词suggest后接宾语从句时，除可用虚拟语气外，也可用陈述语气，两者的区别也是：若谓语动词所表示的情况尚未成为事实，则用虚拟语气，此时suggest通常译为“建议”；若谓语动词所表示的情况为既成事实，则要用陈述语气，此时的suggest通常译为
“表明”、“认为”。比较并体会：
He suggested that we (should) stay for dinner. 他建议我们留下吃饭。
I suggested that you had a secret understanding with him. 我觉得你与他心照不宣。
5.The report says new ways to expand the use of treatments are now being developed.
现在进行时被动语态
现在进行时被动语态结构为：is/am/are being done，is/am/are体现标准对照时间点为现在，并随人称的变化而变化；being体现进行时；being done体现被动语态。
例如：That bridge is being built, I can't stand the noise.那座桥正在被建，我受不了这噪音。
This film is being shown now.这部电影正在被放映。
6. They suffer from an emotional disorder called gelotophobia.
suffer from受…之苦,患有某种疾病
例句：After her operation she suffered from general debility.
她在手术后感到全身虚弱.