不少昆虫都会使用类似喷血的行为防御攻击，例如斑蝥，石蝇幼虫以及蝗虫等。
A number of insects, including blister beetles, stonefly larvae and bushhoppers behave in similar way when attacked.
黑熊幼崽用树来防御，而经常生活在没有树的环境中的棕熊和北极熊则依靠攻击性来保护它们的幼崽。
Black bear cubs use trees for defense, whereas brown bears and polar bears, which regularly inhabit treeless environments, rely on aggression to protect their cubs.
由于上述对策研究重在防御而非攻击，因此还未形成一场军备竞赛。
With the emphasis on defence rather than attack, it is not an arms race yet.
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