Researchers suggest that humans would only survive for four years if the bees disappeared.
研究人员认为，如果蜜蜂消失了，人类就只能存活四年。
To determine what patterns humans leave behind when they chew or gnaw on bones, the researchers had four different groups of European people chew raw and cooked meat bones from various animals.
为了确定人类啃噬骨骼后会留下什么类型的痕迹，研究人员组织了四个不同的欧洲人小组，让他们啃噬不同动物或生或熟的肉骨头。
Brain changes in the mice lasted for more than four months, equivalent to years in humans.
老鼠大脑的变化持续了至少四个月，相当于人类的好几年。
Chimpanzees were nearly four times more likely to wait for the big reward than humans were.
大猩猩等到最大奖励的可能性比人类几乎多4倍。
O (Related: "Future Humans: Four Ways We May, or May Not, Evolve.")
相关：“未来人类：我们可能进化的四种方式，或者不可能。”
She has drawn up a four-point model that could be applied to the behaviour of any creature, including humans, to identify heroic ACTS.
她拟订了用来确定英雄行为的四点模式，可以应用于辨别任何动物(其中包括人类)的行为。
After scientists showed the four crows a series of colour photographs of humans with their hair concealed, one pair was trained to pick men's faces and the other pair women's faces.
研究人员给四只乌鸦观看人的一组彩色照片，但把头发隐藏起来，训练一对乌鸦挑选男人照片，另一对乌鸦去选女人照片。
While there are numerous types of sharks, only four are most frequently cited in encounters with humans—the bull shark, the tiger shark, the great white shark and the oceanic white tip shark.
鲨鱼的种类有很多，而经常被载攻击人的只有四种 –牛鲨（学名白真鲨）、虎鲨（学名居氏鼬鲨）、大白鲨（学名噬人鲨）、白鳍鲨（学名灰三齿鲨）
Those creatures have long had four-color vision, but a key difference is that their fourth type of color detector is in the high-frequency ultraviolet range, beyond where humans can see.
这些动物早已拥有四色觉，但关键的区别是，他们的第四种颜色位于高频的紫外线区域，在人类可视范围之外。
Humans have two legs, dogs have four.
人有两条腿，狗有四条腿。
Of the 240 + species of Aloe, only four are recognized as being of nutritional value to humans and animals.
但在这240多种芦荟之中，仅仅发现了4种是对人类和动物具有营养价值的。
Creepy yet cute, Osaka University's four-foot-tall Child-robot with Biomimetic Body is designed to learn like a child by watching and interacting with humans.
吓人却又不失可爱，大阪大学发明的四英尺（约1.22米）高的仿生儿童机器人，能像幼儿一样，在观察以及与人互动的过程中习得技能。
Further afield four per cent are optimistic there will be a permanent human base on Mars while one in ten expect a colony of humans to be living in space.
有4%的人想得有点远，他们乐观地相信到时候火星上会有一个永久性人类基地，而十分之一的人认为2025年会有人移民太空。
Dr. Hansen, who has been doing research on obese monkeys for four decades, prefers animals that become naturally obese with age, just as many humans do.
汉森博士已从事肥胖猴子的研究40年，她更赞成这个观点：如同人一样，动物也是随着年龄的增长而渐生赘肉的。
That doesn't mean, he added, that humans will ever sleep as little as giraffes, for example, which require two to four hours a night at most.
但这并不意味这人类需要像长颈鹿一样只每天只需要睡二到四小时，他补充说明道。
Humans have lived in the area of Yosemite for more than four thousand years. The first people who lived there were hunters.
人类生活在约塞米蒂地区已经有四千多年了，第一批在此生活的人是打猎者，一个美国土著部落的绝大多数成员都叫他们是“Miwok”，他们居住在约塞米蒂山谷的河边。
A wisdom tooth is in humans any of the usually four third molars, including mandibular third molar and maxillary third molar.
人类的智齿就是第三大臼齿，通常有四颗，包括下颌第三磨牙和上颌第三磨牙。
The disease passed on to humans by female mosquitoes infected with one of four species of parasite.
疟疾是由感染了四种寄生虫中的一种寄生虫的雌蚊子传染给人类的。
There are around 3,000 mosquito species around the world, about four or five dozen of which are of concern to humans because they can transmit serious diseases.
世界上大约有3000种蚊子，其中大约有四、五十种蚊子对人体有害，因为它们能传播严重的疾病。
Here are six ways four-legged friends bring good health and happiness to their humans, simply by being themselves.
以下是这些四只腿的小伙伴带给我们健康和幸福生活的六种方式，仅仅它们是小猫小狗本身这一点就能给予。
Researchers in the late 1960 covered that humans are born with the capacity to approach challenges in four primary ways: analytically, procedurally, relationally (or collaboratively) and innovatively.
（考研真题）六十年代末研究者称人类与生俱来能用四种主要方法应对挑战，即深入分析、有序进行、协调合作，创造革新。
Thirty-four times humans have sent spacecraft to our planetary neighbor.
人类曾三十四次派遣宇宙飞船到我们的行星邻居火星。
Thirty-four times humans have sent spacecraft to our planetary neighbor.
人类曾三十四次派遣宇宙飞船到我们的行星邻居火星。
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