相关单词同义词secure, watch, preserve, 近义词 convoy, defend, guard, safeguard, save, secure, shelter反义词attack, threat临近词protection, protease, protecto, protectin, protecter, protected, protectand, Protecteur, protectoin, Protectron, protectant, protect tab相似词protagonist, protean, protease, protease inhibitor, protection, protection money, protection racket, protectionism, 返回 protect