Rats and other animals need to be highly at tuned to social signals from others so that they can identify friends to cooperate with and enemies to avoid.
老鼠和其他动物需要高度关注来自别的动物的社交信号，以便它们识别哪些是可与之合作的朋友或需要避免的敌人。
"I don't believe that they had a three-second memory because animals need their memory, so they build up over time knowledge of where the food is," said Roy Stokes, a student at the Australian Science and Mathematics School.
澳大利亚科学与数学学校的学生罗伊·斯托克斯说：“我不认为它们有三秒钟的记忆，因为动物需要记忆，这样它们就会随着时间的推移逐渐了解食物在哪里。”
Rats and other animals need to be highly attuned to social signals from others so they can identify friends to cooperate with and enemies to avoid.
老鼠和其他动物需要对来自其他动物的社会信号有高度的协调性，这样它们才能分清哪些是可以合作的朋友，哪些是要躲避的敌人。
Plants need soil, and animals need food.
植物需要土壤，动物需要食物。
What do human beings, plants and animals need to survive?
人类生存的条件和动植物生存的前提是什么？
Animals need to eat many portions of plants to produce one portion of meat.
动物长一点肉需要吃掉大量植物。
Well, we have to let you go since our timer is beeping up and our animals need to be attended.
好了，我们得让您自己浏览了，因为我们的记时器在催促了，还有那些实验动物也需要检查了。
D. Monkeysand other social animals need to learn behaviors appropriate for their social groups.
原句中，前面是论点后面是论据，学习合适的社会行为对群居物种很重要，举猴子的例子。
Hunting animals need hunting grounds. And that inevitably brings them in conflict with humanity.
肉食动物需要捕食场地，但这与人类活动不免发生冲突。
D. Monkeys and other social animals need to learn behaviors appropriate for their social groups.
原句中，前面是论点后面是论据，学习合适的社会行为对群居物种很重要，举猴子的例子。
As we all know, plants and animals need water. So do the people's life and production, life couldn't go on without water.
正如我们所了解的，动植物需要水，人类的生产生活也需要水。没有水便没有生命。
As we all know, plants and animals need water. So do the people's life and production, t, ife couldn't go on without water.
正如我们所了解的，动植物需要水，人类的生产生活也需要水。没有水便没有生命。
In order for evolution to continue to exist, some people and animals need to always stay alive to keep reproduction to continue.
为了进化继续生存，有些人和动物需要活下来，繁育延续下一代。
All plants and animals need nitrogen. Nitrogen is a major element in the proteins in our bodies. The atmosphere is mostly nitrogen.
所有动植物都需要氮。氮是人类身体中蛋白质的主要组成部分。大气中也主要是氮气。
Different types of plants and animals need different conditions to grow well in and there is a variety of types of farming around the world.
不同种类的植物和动物需要在不同的生长条件，因此世界各地有各式各样的农场经营方式。
Reduced reliance on chemicals in agriculture is part of the solution, says Buchmann, since all animals need their immune systems in top shape to combat pathogens in their environment.
布克曼认为，减少对化学物质的依赖也是部分的解决之道，因为为了对抗环境病原体的侵入，所有动物的免疫系统都要保持最佳状态。
Whales being sociable animals probably need the stimulus of sizeable gatherings to induce reproductives behavior.
鲸作为社会性动物，可能需要大规模聚集的刺激来诱导繁殖行为。
Now people in towns and cities do not need dogs to fight other animals any more.
现在，城镇和城市里的人们不再需要养狗来和其他动物搏斗了。
They have camels, sheep and other animals. These animals depend on the desert plants for their food and do not need much water.
他们有骆驼、绵羊和其他动物。这些动物以沙漠植物为食，不需要太多的水。
As they began to settle, grow plants and herd animals, the need for a sophisticated number system became paramount.
当他们开始定居、种植作物和饲养动物时，他们对复杂数字系统的需求变大。
To prepare for this before winter, these animals eat extra food to become fat which gives them the energy they need while they sleep.
为了在入冬前做好准备，这些动物会吃更多的食物来增肥，从而获取睡眠时所需的热量。
Young animals play in order to get really good at certain specific things they will need to do when they are adults, like chasing, pouncing, climbing.
幼兽玩耍以变得擅长于一些成年后具体需要做的事情，比如追逐、猛扑、攀爬。
Willow began running, swimming and even sewing toys to raise money for animals in need of help.
薇洛开始跑步、游泳，甚至缝制玩具，为需要帮助的动物筹集资金。
Wild animals which are now in danger need our protection.
现在正处于危险中的野生动物需要我们的保护。
Animals also use color for their own need.
动物也会根据自己的需要使用颜色。
Li and his workmates need to work extra hours to take care of the animals from March until mid-May.
从3月到5月中旬，李和他的同事需要加班来照顾这些动物。
You need to wash your hands with soap and water before you eat, after you use the toilet, and after you touch animals, because your hands may carry viruses.
在吃饭前、上完厕所和接触动物后，你需要用肥皂和水来洗手，因为你的手可能会携带病毒。
Humans are social animals, and we need regular socializing to keep ourselves in peak health and energy.
人类是社会性动物，我们需要有规律的社交活动来让我们保持健康和富有活力。
Humans are social animals, and we need regular socializing to keep ourselves in peak health and energy.
人类是社会性动物，我们需要有规律的社交活动来让我们保持健康和富有活力。
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