safety是名词；n.安全;平安;安全性;无危险;安全处所

safely是副词，safe只是形容词。

例句：

He didn't seem in the least concerned for her safety.

对她的安全他似乎一点都不担心。

Firefighters formed a human chain to carry the children to safety.

消防队员组成人链把孩子们救到了安全的地方。

The health and safety officer will guide you through the safety procedures.

卫生安全官员将向你把安全规程解释一遍。

Information about safety procedures is in the pocket in front of you.

关于安全求生的资料放在您前方的小袋子里。

There is considerable disagreement over the safety of the treatment.

这种疗法是否安全争论很大。