中英文本

Cigarette smoking has declined slowly but steadily in the U.S., still over 42,000,000 adults are cigarette smokers and about 33,000,000 of these smokers smoke every day.
美国的吸烟率正在稳步下降，但是仍然有4200万成年人吸烟，其中有3300万每天都吸4*ma%Zp(^I;x;5M。
Smoking remains a leading cause of major health problems and is linked to nearly a half a million deaths each year.
吸烟仍然是健康问题的主要原因，每年都与50万例死亡相关o)3^MEM4Q@DYtXgY。

Smoking is associated with most cancers, as well as heart disease, stroke, infertility, and asthma.
吸烟与多数癌症、心脏病、中风、不孕症以及哮喘相关7|m%xGoTUYly87Gc。
What's encouraging is that the largest decrease in people who have quit smoking is among 18 to 24 year olds.
鼓舞人心的是最大的戒烟人群在18至24岁之间rzif]Gvt#Ibg。
No matter how long you've smoked, quitting can significantly reduce your risk for serious health problems.
不论你的烟龄有多久，戒烟都能大大降低患上重大健康问题的风险2;)K(&_z&Ed|In%Hu%tp。

译文属可可英语原创，未经允许，不得转载|O[n7v@kH-Qvs。

重点讲解

1.is linked to 与...相关
例句：The profile UML definition is linked to the model indirectly through the version.
这个概要文件的 UML 定义通过版本直接链接到这个模型RDv,dxY#sqK。

2.is associated with 与...有关系，涉及
例句：Which part is associated with homework and school?
哪个部分是与家庭作业和学习想联系的？