safeguard

n.安全设备、措施

saddler, saddlery, sadhu, sadism, sadist, sadistic, sadistically, sadly, sadness, sado-masochism, sado-masochist, sae, safari, safari park, safari suit, safe, safe conduct, safe deposit (US ,safe deposit), safe house, safe seat, safekeeping, safely, safety, safety curtain, safety glass, safety island (also `safety zone), safety lamp, safety match, safety net, safety razor, safety-belt, safety-catch, safety-pin, safety-valve, saffron, sag, saga, sagacious, sagaciously, sagacity,