Disney's arsenal includes insecticides which kill mosquitoes fairly quickly, growth regulators which reduce their lifespan, and maintaining natural predators in the area that eat the bugs as part of their diet.

迪士尼乐园的仓库内包含了可以很快杀死蚊的杀虫剂、减少蚊的生长调节剂，还在该区域内饲养了以蚊的天敌。

With no natural predators, there is little need for winter camouflage.

因为没有天敌，冬季的伪装就没有多大必要。

Worms and enemies and crustaceans are protected there.

蠕虫和它的天敌，还有甲壳类动物都能在这里得到保护。

They did not know when, what, and how to feed the larvae. And they knew little about the predators that attack and eat baby oysters by the millions.

他们不知道何时、用什么以及如何喂养幼贝。他们对捕食数百万幼小牡蛎的动物天敌也所知几。

This rabbit had no natural enemies in the Antipodes, so that it multiplied with that promiscuous abandon characteristic of rabbits.

这种兔在澳大利亚及新西兰没有天敌，因此便以兔所特有的杂乱交配迅猛繁殖起来。

A creature that can change it's shape to avoid predators.

这种生物可以改变自身的形状以躲避天敌。

Hedgehogs are also finding it easier to live in urban areas - this time because their predators are not finding it quite so attractive to leave their rural environment, so hedgehogs have a better survival rate in cities.

刺猬也更容易在城市生，因为它们的天敌不愿意离开乡村的环境，所以刺猬在城市的更大。

Because of their tremendous size, polar bears have no natural predators apart from humans.

也正是由于巨大的体型，除人类以外，北极熊没有任何天敌。

That's the top predator that hunts other animals but has no predators of its own.

“apex predator”指捕食其他动物，但没有天敌的捕食者。

It means they have no natural enemies and no one can take them down.

意思是它们没有天敌，没谁能消灭它们。

They've got predators in the water and on land, well, in the sky. anyway.

它们在水中、陆地上，甚至天空中都有天敌。

Their coloration provides critical camouflage from predators.

他们的颜色有着重要的伪装作用，躲避天敌。

Penguins have hardly any natural enemies in the Antarctic.

企鹅在南极几乎没有天敌。

The weasel refused, saying that he was by nature the enemy of all birds.

鼬鼠拒绝了，说他是任何鸟类的天敌。

Which would make them and their offspring an easy meal.

这会使树蛙及其后代轻易成为天敌的盘中餐。

Such flummery is costly to grow and likely to attract predators.

这种装饰物会威胁生，可能招致天敌。

Once they arrive, the tables are turned.

攻击者的天敌们一到，局面就扭转了。

Scientists warn the hippos do not have a natural predator in Colombia.

科学家警告称这些河马在哥伦比亚没有天敌。

Don't you know love and friendship are natural foes?

你难道不知道爱情和友情是天敌吗？

And he says the snakehead's natural predators, including smaller fish, instinctively adjusted to its presence.

他还表示，蛇头鱼的天敌，包括小鱼，本能地适应了它的在。