Ants keep predatory insects away from where their aphids feed; Gmail keeps the spammers out of our inboxes.

蚂蚁赶走蚜虫进之处昆虫；谷歌邮箱也帮助我们在收件前远离那些垃圾邮件制造者。

So do you kill the introduced predators to save the endangered species?

所，要杀掉引入动物来拯救濒临绝种物种吗？

For decades, aquariums have tried to contain the world's largest predatory fish.

几十年来，各家水族馆试图容纳世界上最大类。

So how did some whales go from chomping predators to filter feeders?

那一些鲸是如何从咀嚼动物变成滤动物呢？

Ecologists have long assumed the predators can influence their ecosystems in two main ways.

生态学家一直认为，动物可通过两种主要方式来影响生态系统。

Tom Gable is tracking a predator. In fact, he's tracking a whole pack of them.

汤姆·盖博在追踪一个动物。事实上，他在追踪一大群动物。

Polar bears are pure predators, so they kill other animals to eat. That's how they survive.

北极熊是地道动物，它们猎杀其他动物为生，这是它们生存方式。

The first was whether they might be able to learn new predators, specifically people, based on their association with dead crows.

第一，它们是否能根据人和死亡乌鸦之间关联辨识出新动物，特别是人。

Yet predatory animals, to include sharks, are not very big risk takers.

然而，包括鲨在内动物，并非冒险家。

Some experts say that blackbirds may have been trying to escape a predatory bird.

一些专家认为，黑鸟可能正在试图逃离一只鸟类。

You have information about the sex predator?

你有关于者信息吗?

Predators have been observed to avoid attacking brightly coloured species.

【observe】据观察发现，动物会避免袭击色彩鲜艳物种。

So is Toxo manipulating our brains as an evolutionary strategy to get predatory cats to eat us?

那么，刚地弓形虫是否正作为一种进化策略，操控着我们大脑，诱使猫科动物我们呢？

This reef has suffered in the last few years six cyclones, two major coral-bleaching events, and various attacks by the predator crown-of-thorns starfish.

在过去几年，珊瑚礁遭遇了六次气旋，两次重大珊瑚白化，还有动物棘冠星几次攻击。

What predatory adaptations does Velociraptor have that you would be able to observe in the actual fossil?

您可在实际化石中观察到 Velociraptor 具有哪些适应？

They also found predators on the herbivores, in the form of ciliates (a type of protozoan) and predator bacteria, which feed on other bacteria.

他们还发现了这些草动物为者，存在形式是纤毛虫（一种原生动物）和其他细菌为细菌。

In 300 AD, Chinese farmers specially bred ferocious predatory ants in orange orchards to protect the trees from other bugs.

公元300年，中国农民在柑橘园中特意培育凶猛蚂蚁，保护树木免受其他害虫侵扰。

Predatory deer dogs frolicked along ancient rivers, while their relatives returned to the ocean to become the first otter-like whales.

鹿犬在古老河流边嬉戏，而它们亲戚则返回海洋， 变成了最早类似水獭鲸类。

And what scientists have discovered is that predator fish will often chase after this differently colored minnow because it is easy to see.

科学家们发现，类常常会追逐这种颜色与众不同米诺，因为它们很容易被发现。

Like in New Zealand, for example, tons of iconic animals like the Kiwi are threatened by introduced predators, including stoats, which are, like, this cute furry little weasel.

比如，在纽西兰，许多代表动物，比如鹬鸵，受到引入动物威胁，包括短尾鼬，它们就像毛绒绒可爱小鼬鼠。