研究者发现：在2004年全球有40%的儿童，33%不吸烟的男性和35%不吸烟的女性正面临二手烟的危害。

Worldwide, as many as 40% of children, 33% of non-smoking men and 35% non-smoking women were exposed to second-hand smoke in 2004, researchers found.

youdao

研究者发现：在2004年全球有40%的儿童，33%不吸烟的男性和35%不吸烟的女性正面临二手烟的危害。

Worldwide, as many as 40% of children, 33% of non-smoking men and 35% non-smoking women were exposed to second-hand smoke in 2004, researchers found.

youdao