Drought and flood in flood season  汛期旱涝趋势

built-in safety feature  内装安全装置

Designed in Safety  安全设计

drinking water safety in rural area  农村饮水安全

Drinking Water Safety in Rural Areas  农村饮水安全

ensuring safety in production  安全生产

factor of safety [= safety factor]  安全因素; 安全因数

fetal safety in uterus  胎儿宫内安危

flood safety  防洪安全

flood safety analysis  防洪安全分析

flood safety of dam  大坝防洪安全

Hidden danger in safety  安全隐患

hidden trouble in safety  安全隐忧

hidden trouble of safety in production  安全生产隐患

in safety  平安地

Investment in safety  安全投资

life safety in hospital  医院生命安全

management of safety in production in coal mine  煤矿安全生产管理

Navigation safety in fog  船舶雾航安全