Man was defined as a rational being, as a social animal, an animal that can make tools, or a symbol-making animal.
人类被定义为一种理性的存在，一种群居动物，一种可以制造工具的动物，或者一种制造符号的动物。
Archaeologists revised the date after spotting distinctive cut and crush marks made by stone tools on animal bones dating to 3.4m years ago.
考古学家在辨认出340万年前的动物骨头上，存在石器工具造成的明显变形的切割痕迹后，修改了人类最早使用工具的时间。
Thus man was defined as a rational being, as a social animal, an animal that can make tools, or a symbol-making animal. CET-6, 2004.1.
所以人类被定义为一种理性的生命，一种社会动物，一种能制造工具、制造符号的动物。
The Federmesser culture is known for its distinctive flint blade tools, while the Ahrensburg people were famous for their animal-hunting prowess.
Federmesser 文明以其独特的燧石石瓣工具闻名，而阿伦斯堡人以其捕兽本领闻名。
The images, they say, will be valuable tools in future studies of animal anatomy for both research and education.
他们认为，这种成像技术在将来动物解剖学的研究上是非常有价值的，无论是进行科研还是开展教学。
Remains thought to belong to two males and three females were found next to stone tools and animal bones bearing cut marks, suggesting the species prepared meat for food.
这些遗骸化石被认为属于两名男性及三名女性，发现时旁边还有一些石器及有切割印迹的动物骨骼化石，这表明这些原始人当时在准备肉食。
Thus man was defined as a rational being, as a social animal, an animal that can make tools, or a symbol-making animal.
因而，人就被定义为一种理性的生物，一种社会动物，一种能制造工具的动物或者一种会制造符号的动物。
Still, most field work was done with hand tools like the spade, hoe, and scythe, or with hand- or animal-driven plows.
尽管如此，大多数的庄稼活仍以手工工具完成，比如铁锹、锄头、长柄镰刀，手推犁或者动物推犁等等。
Theymade use of animal bones, which they carved into basic tools.
他们利用兽骨，把兽骨雕成基本工具。
While traditional trainers may also use praise and rewards, dominating the animal and obtaining control over its behavior are the main goals, and the main tools are fear and pain.
虽然也可以使用传统的培训对其行为的赞扬和奖励，并取得动物主宰控制的主要目标，主要工具是恐惧和痛苦。
The manufacture and use of tools was once believed to be uniquely human, but we now know that we share this ability with some animal species, although it seems rare.
制造和使用工具曾一度被认为是人类所特有的本领，但现在我们了解到，某些种类的动物也会制造和使用工具——尽管这样的动物似乎比较少见。
Primitive people lived in caves and made tools from stones and animal bones.
原始人住在洞穴里并以石头和动物的骨来做工具。
In primitive societies tools were made from sharp stones and animal bones.
在原始社会，工具是由尖利的石头和动物的骨头制成的。
Liver cancer animal models are important experimental tools in studies on liver cancer and to certify targeting drug delivery system.
肝癌动物模型是抗肝癌药物实验及肝靶向给药系统验证的重要方法和手段。
Spinning tools, such as stone and pottery spinning wheels and bone needles, indicate people at that time can make clothes by sewing up animal skins.
遗址里出土了不少石纺轮、陶纺轮和骨针等纺织工具，说明当时人们已学会利用多种纺织工具缝合兽皮做成衣服。
Spinning tools, such as stone and pottery spinning wheels and bone needles, indicate people at that time can make clothes by sewing up animal skins.
遗址里出土了不少石纺轮、陶纺轮和骨针等纺织工具，说明当时人们已学会利用多种纺织工具缝合兽皮做成衣服。
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