There really is no such thing as a totally risk-free industry.

完全没风险的行业实际上是不存在的。

《柯林斯英汉双解大词典》

It also acknowledges that widespread deployment of LEO CubeSats isn't risk-free.

报告也承认，广泛部署近地轨道立方体卫星并不是零风险的。

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Toolbelts free both hands and lessen the risk of dropping hammers.

工具带解放了双手，并减少了锤子掉落的危险。

《柯林斯英汉双解大词典》

People from malaria-free countries who visit areas with high rates of malaria are also very much at risk.

VOA: special.2010.04.20

But my best guess is that someone on that risk free arbitrage desk moved from risk free pure arbitrage into very definitely not risk free time arbitrage, or speculation as we should call it, then the market moved against his bet.

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However, given the cycle of funds from the left pocket of the U.S. government the Fed to the right pocket the Treasury selling T-bills is the risk-free rate really risk-free?

FORBES: Ben Bernanke's QE3: The Best Thing for Crowdfunding Since the JOBS Act

In the United States, the deep recession of 1918 damaged consumer purchasing power and convinced many to park their capital in tax free, risk free, bonds.

FORBES: The Bush Tax Rates Are Too High To Move This Boulder