1. camouflage n. 伪装，掩饰，迷彩服 v. 伪装，欺瞒

Some insect have a natural camouflage which hide them from the attack of their enemy.
有些昆虫有一种天然的保护色可以防止敌人的袭击。

The soldiers camouflaged themselves with leaves and branches.
士兵们用树枝树叶把自己伪装起来。

2. predator n. 食肉动物，掠夺者

Cats are warm and affectionate creatures to us, but viewed through the eyes of birds and mice they are vicious predators.
对我们来说，猫是热情又充满深情的动物，但是在鸟儿和老鼠看来，猫是恶毒的食肉动物。

Young birds are very vulnerable to predators.
幼小的鸟易受食肉动物伤害。

3. outrun vt.追过；逃脱

The favourite easily outrun the other horse in the field.
那匹热门马一下子就把其他的马甩在了後边。

He let his zeal outrun discretion.
他让热心超越了谨慎。

4. trust vt. 委托，相信

My husband trusts me and I don't intend to break that trust.
我的丈夫信任我，所以我不想失去这种信任。