If you travel by bus in Sao Paulo,Brazil these days your vehicle may be powered by hydrogen fuel cells.

VOA: special.2009.09.07

So, people are talking about the use of hydrogen in fuel cells.

人们在讨论,如何把氢用在燃料电池中。

麻省理工公开课 - 固态化学导论课程节选

The bus uses a hybrid system that combines the hydrogen fuel cells with high power batteries.

VOA: special.2009.09.07

The Apollo space program relied on hydrogen fuel cells, which work by stripping electrons from hydrogen atoms.

FORBES: Mr. Burns' Dilemma

Battery power is one alternative, but so are hydrogen fuel cells, which offer greater range.

FORBES: Written by Jim Motavalli

Then he mentioned cars powered by hydrogen fuel cells that emit only water.

FORBES: Mr. Burns' Dilemma