Finding themselves safely at home, it would be of no importance whether they had ever been away."

VOA: special.2009.12.31

So they have to be engineered to be inert so that they can be safely inside a system and there's not every material you could pick would have that property.

缝合线必须是惰性的,以便确保植入人体后的安全性,不是随便哪个材料都能做到这一点

耶鲁公开课 - 生物医学工程探索课程节选

Once the Games end February 28, safely and effectively getting all fans,athletes, and officials out of Vancouver will be a huge task as well.

VOA: standard.2010.02.21

There have been concerns expressed that a run-off election cannot safely be held in the coming weeks because of security threats and oncoming winter weather.

VOA: standard.2009.10.19

Spokesman Ken Haldin says a combination of testing by BP, the Environmental Protection Agency and landfill operators, including Waste Management, should ensure that debris from the oil cleanup can safely be added to household waste in these facilities.

VOA: standard.2010.08.05