专家称至今还不清楚这种装置会带来什么危害，也不清楚里面的成分是否有害年轻人的健康。
Experts say it is not yet known what harm the tobacco-free devices could inflict and that their contents could be damaging young people's health.
他们在研究中称这种左心室辅助装置在联用一些适当的药物时可以提高心脏功能并促进其恢复。
The left ventricular assist device, or LVAD, can boost the heart's ability to function, allowing it to recover if used with the right drugs, the researchers said in a study.
据当地官员称，这种垃圾桶的外表和其他垃圾桶一样呈桔黄色，盖子上装有一块太阳能电池和语音装置。
It looks just like any other orange bin, except it' s equipped with a solar panel on its lid and has a sound mechanism, " said Bernd Mueller of the city' s refuse collection department."
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