not protected against being hurt or damaged 未受保护的;未设防的 They hunt in packs, attacking the old, sick and unprotected young animals. 它们成群猎食,攻击年老、生病和未受保护的小动物。
not covered to prevent it from causing damage or injury 无防护罩的;无掩护的 (of sex )性交 done without using a condom 未用避孕套的;无防护的