be about to  即将～，正要～[to之后接动词原形]

We are about to start.
我们正要出发。
The sun is about to sink.
太阳即将要下山

Smoking may cause depression in teen-agers

青少年吸烟会造成意志消沉

Study contradicts current theory that low mood triggers tobacco use

Smoking may be a cause of depression in teen-agers, a new study suggests, contradicting the current thinking that says depressed people may smoke to feel better.

青少年吸烟会造成意志消沉 一项新研究发现，吸烟可能会造成青少年意志消沉或沮丧。这项结论推翻了吸烟能平复心情的说法。

THE STUDY found that teens who smoked were about four times more likely to develop highly depressed symptoms during a year’s time.

The researchers speculated that nicotine or other smoking byproducts may have a depressive effect on the central nervous system.

The study adds to a growing body of conflicting research on links between tobacco and the mind.

The thing that bolsters the idea is that there is evidence that anti-depressant drugs are helpful in treating nicotine addiction,” said Dr. Elizabeth Goodman, an adolescent-medicine specialist at Children’s Hospital Medical Center of Cincinnati, who led the study.

The study appears in the October issue of Pediatrics, the monthly journal of the American Academy of Pediatrics.

Other researchers have linked teen smoking with suicide, and smoking with depression in adults, but they disagree over whether tobacco use is a cause or merely a result of a depressed state. Lung Cancer MSNBC Interactive ? Find out more about the causes of this disease

Most think people “who have tendency to have depressed mood self-medicate by smoking. This is probably not the case,” said Naomi Breslau, director of research at Henry Ford Health Systems in Detroit.

Breslau’s own research also has suggested tobacco may somehow contribute to depression. She said that while the new findings do not prove smoking is a cause, they strongly support that theory.

“They find absolutely no evidence that depressive symptoms per se increase the risk for smoking,” she said. “They do find very clear evidence in the other direction.”

She added: “It’s just one more adverse effect of smoking on health.”

The study relied not on doctors’ diagnoses but on teen-agers’ reports of having symptoms suggestive of depression.

The study analyzed data from teens questioned in 1995 and 1996 in a national study on adolescent health. It included 8,704 teens who were not initially depressed and 6,947 teens who were not initially smokers.

I'm afraid all my efforts were in vain『徒劳;白费力』（我的努力白费了。）

【相关句子】
*All our work was in vain.
(我们白干了一场。)
*We tried in vain to make him change his mind.
(我们试图使他改变他的主意，但白费力气。)

make a thing of
(exaggerate the importance of significance of something)

大肆渲染

A: I don't understand why they're making a thing of this story. It's just a boy who survived a shipwreck.
我不懂事情他们为何大肆渲染这个报导。只不过是一个船难余生的小男孩罢了。

B: You're right. I really want to know who will benefit from it all.
没错，我想是有谁想从中渔利。