After the half hour on the second task was over, the E conspicuously set the stop watch back to zero, put it away, pushed his chair back, lit a cigarette, and said
第二项任务完成后，E故意动作明显地归零秒表，放在一边，然后拉回凳子，点上根烟说道
In fact, combined e-cigarette and cigarette use among adolescents in 2014 was higher than total cigarette use in 2009, according to the study.
事实上，据研究发现，2014年同时在抽烟和抽电子烟的青少年数量要比2009年显示的吸烟数据更高。
E-cigarette popularity has increased and with that another possible source of toxicity.
电子香烟开始变得流行，于是产生了另一种可能的毒性来源。
The growing popularity of e-cigarette has prompted debate about their safety and potential to help people quit tobacco smoking and the risk they may encourage some people to take it up.
吸食电子烟越来越流行，引发了关于其安全性以及帮助人们戒烟的能力的辩论，还有人担忧吸食电子烟会导致一些人再度吸烟。
They found that cigarette smoking among U. S. adolescents declined 4 during that decade, but did not decline faster after the advent 5 of e-cigarettes in the U. S. between 2007 and 2009.
他们发现，在这十年内，吸烟的青少年的数量在下降，但在2007年至2009年期间，由于电子烟的出现，下降的速度开始变慢。
They found that cigarette smoking among U. S. adolescents declined 4 during that decade, but did not decline faster after the advent 5 of e-cigarettes in the U. S. between 2007 and 2009.
他们发现，在这十年内，吸烟的青少年的数量在下降，但在2007年至2009年期间，由于电子烟的出现，下降的速度开始变慢。
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