secondhand

adj.

旧的；用过的；二手的；（消息、信息等）间接得来的

1. He is in the secondhand car trade.
   他是从事二手车买卖的。
2. So moon-light is only secondhand sunlight.
   所以月光仅是间接的阳光。
3. The store deals in secondhand clothes.
   这家商店经营旧衣服。
4. At a secondhand store I ran across the works of his early years.
   我在一家旧货店无意中碰到了他早年的作品.

1. I only heard about it secondhand.
   我是间接得到这个消息的。
2. This is a book I bought secondhand years ago.
   这是我几年前买的一本旧书。

Cardiovascular Effects of Secondhand Smoke
Worldwide Burden Of Disease From Exposure To Secondhand Smoke
Vital Signs: Nonsmokers' Exposure to Secondhand Smoke — United States, 1999–2008
Prenatal tobacco smoke and postnatal secondhand smoke exposure and child neurodevelopment.
Legislative smoking bans for reducing secondhand smoke exposure, smoking prevalence and tobacco consumption
Trends in the exposure of nonsmokers in the U.S. population to secondhand smoke: 1988-2002.
Brief Secondhand Smoke Exposure Depresses Endothelial Progenitor Cells Activity and Endothelial Function : Sustained Vascular Injury...
Attitudes and beliefs about secondhand smoke and smoke-free policies in four countries: Findings from the International Tobacco Cont...
Changes in exposure of adult non-smokers to secondhand smoke after implementation of smoke-free legislation in Scotland: national cr...
Declines in acute myocardial infarction after smoke-free laws and individual risk attributable to secondhand smoke.