说得好像真有那么一回事,但是那么贵就很难普及,怎么看都只是少数自认环保先进的有钱人的高级玩具...
Now that you say it, it seems like that really is the case. But it will be unlikely to gain popularity at that price. However one looks at it, it's really just an expensive toy for a small minority of wealthy people who think of themselves as environmentally responsible.