•Water and other liquids can stain unprotected wood surfaces.水和其他液体会令未加保护的木材表面染色。

•Although some marine mammals are protected by environmental laws, many remain unprotected.尽管有一些海洋哺乳动物受到了环境法的保护，但还有很多不在其中。

•The lack of a shell leaves the larvae unprotected against predators.没有外壳保护使这些幼虫不能抵御天敌的捕食。