In fact, researchers said the "effect is so fast that it's equivalent to injecting the substance directly into the bloodstream," in findings described as a "stark warning" to those who smoke.

事实上，研究人员认为这项发现足以“严重警告”那些吸烟者，因为“这种损害的效果来得如此迅速，相当于直接将这些物质注射到血管内。”

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There is usually quite a bit of advance warning between the first signs of smoke and the undeniable reality that the house is on fire.

一座房子着火之前，在冒烟的时候肯定有许多事前的警告信号。

youdao

He was as blunt and stubborn as ever and had inherited his mother's wry humor: he regularly rattled young medics by pointing to himself and warning, "Don't smoke while shining your boots."

他和以往一样率直固执，并继承了他母亲的略带讽刺味道的幽默：他经常不假思索，直言不讳地指着自己警告青年医务人员，“擦靴子时不要吸烟。”

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But now researchers led by Doctor Jonathan Winickoff at MassGeneral Hospital for Children in Boston are warning about what they call "third-hand smoke."

VOA: special.2009.01.07

About seven hours later emergency services gave the green light for residents to go home, with the warning "smoke is likely to continue for the next few hours".

BBC: Fire on Rotherwas Industrial Estate

The pilots saw a warning on their computer screen telling them there was smoke inside one of the electrical compartments, the airline said.

BBC: Top Japan airlines ground Boeing 787s after emergency

Temperatures reached a record 39C (102F) in the capital on Thursday, with health experts warning of pollution levels 10 times higher than normal safety limits due to the thick pall of smoke from nearby wildfires.

BBC: Russia mobilises 240,000 to fight deadly wildfires