【英语时差8,16】电子烟真的安全吗？

（单词翻译）

 E cigarettes are battery-powered tubes that look like real cigarettes. But instead of inhaling¹ and getting a lungful of tobacco smoke, you basically suck in vaporized nicotine². According to companies that make e cigarettes, since there’s no tobacco smoke, there are also none of the toxic³ ingredients that come with it, like tar⁴ and other cancer causing chemicals found in cigarettes. Instead, with e cigarettes you just get nicotine. E cigarette makers⁵ claim it’s similar to wearing a nicotine patch.