1·Roan said there's still not a good way to carry significant amounts of hydrogen for long distances.
罗安表示，目前没有什么好方法能远距离运输大量的氢。
2·Older stud books list roan as an Akhal-Teke color, although this line seems to have died out.
旧螺柱书籍作为阿克哈·塔克马的颜色列表罗安，虽然此行似乎已经死了。
3·And while the costs of making fuel cells remain high, Roan said they "ve dropped by 30 percent in the last two years."
尽管制造燃料电池的成本居高不下，罗安表示这一成本近两年来已经下降了30%。