safe: can imply that a risk has been run without incurring harm or damage: arrived home ~ and sound; or can stress freedom from risk: kept her ~ from harm; or can suggest a character that eliminates or mimimizes risk: ~ investments.


secure: usually stresses a freedom from anxiety or apprehension of danger or risk based on grounds that appear sound and sufficient: reached a ~ harbor before the storm broke.   (grounds根据，这里译作准备)   security是充分完善的safety，一般个人小范围用safety，团体大范围用security，如人身安全是personal safety，国家安全是national security


safe安全: 指经历风险但未受损失，或没有风险，或能抵御风险，secure安全: 指不必担心风险，因为做了完善充分的准备


记忆方法: 1) 安全的意思是免于危险风险mean free from danger or risk.