safely和safety的区别：safely是副词安全地的意思，safety是名词安全的意思。safely的例句：He learned to walk safely up and down stairs；safety的例句：They crossed the road in safety。
safety的例句：There is grave concern for the safety of witnesses（人们非常担心证人的安全）；safely的例句：Traders generally travel safely through the border（商人通常可以安全通过边界）。
