Their best defense is to keep an eye on the danger, 它们最好的防御是警惕危险
The mammal's intelligence is his only defense... 哺乳动物的智慧是它唯一的防御手段
The herd has its own defense against the cheetahs' blistering speed. 兽群自有 对抗猎豹惊人速度的防御策略
They have no defense against this new type of reptile... 面对这种新型爬行动物 它们毫无办法
Once upon a time, this defense would have worked. 在过去 这种防御会有效果
where the best form of defense is attack. 在这里 最好的防守就是进攻
but sternness in defense of the realm is no vice. 不过对保护王国而言,严厉不算缺点
Go after it, and it has a special defense. 如果继续惊动它,就会看到它的特别防御
Sand dollars flat sea urchins cluster together as a defense 成群的饼海胆叠加起来组成防御阵线