safesn.保险箱（safe的复数）；钱盒safeadj.安全的；安然无恙的；可靠的；谨慎的n.保险箱Safe Environment安全环境safe take-over有效接棒safe harbor rule避税规则safe supervision安全监察safe electricity安全用电safe agro-food无公害农产品safe access agent安全访问代理safe burst height安全爆炸高度safe prime number安全素数safe water source安全水源