白喉-破伤风-无细胞百日咳-b型流行性感冒嗜血杆菌联合疫苗
accellular pertussis and hemophilus influenza type b combined vaccine
Tetanus
Diphtheria
动态无风险折现率
dynamic risk-free discount rate
没有无风险免费午餐
No Free Lunch with Vanishing Risk
三肋式无风撑系杆拱
Self-anchored arch bridge
无风不起浪
Where there’s reek and there’s heat
There is no smoke without fire
Coming events cast their shadows before
There’s no smoke without fire
无风撑系杆拱
Without wind bracing tied-arch bridge