几种狗的一种，开发或培养来做有用的工作，如看守畜群、拉车或雪撬，或看守财产。
Any of various breeds of dogs developed or trained to do useful work, such as herding animals, pulling wagons or sleds, or guarding property.
19世纪末，狗舌草被偶然引入新西兰，像许多入侵的外来物种一样，它很快就变成了一种有害生物。
Ragwort was accidentally introduced to New Zealand in the late nineteenth century and, like so many invading foreign species, quickly became a pest.
佩拉尔塔家的母狗在去年复活节期间怀上了狗崽——恰好这段时间奥巴马全家表示希望找到一种合适的宠物犬。
Peralta's female dog is expecting puppies at Easter time—around the period that the Obamas hope to get their dog.
艺术家设想的此类鳄鱼中的一种，有一个像狗一样的柔软的鼻子，能在陆地上疾驰。
Artist's conception of one of the crocodiles, which had a soft, dog-like nose and was an agile galloper.
可能如果当我在单身的时候养一条狗的话，它将帮助我为一种关系付出做好准备。
PERHAPS if I'd had one while I was single, it would have helped prepare me for the demands of a relationship.
它不是一直狗，而是一种住在地下隧道里的啮齿类动物。
It's not a dog, but a rodent that lives in underground tunnels.
在新西兰，一种尚未鉴别的有毒海藻被认为是造成本周奥克兰沙滩上两只狗死亡的真凶。
In New Zealand, an unidentified toxic algae was blamed this week for causing the deaths of two dogs on beaches in Auckland.
更近的有，一种被新美国基金会的教育专家萨拉·米德称作“男人咬狗”的感觉以及公众和家长的忧虑已经转移到了男孩身上。
More recently, in what Sara Mead, an education expert at the New America Foundation, calls a "man bites dog" sensation, public and parental concerns have shifted to boys.
这种狂热似乎与其他地方的销售模式和常规相违背，尤其是对于一种以凶猛而著称的普通狗来说。
The craze seems to defy sales patterns and common sense elsewhere, especially for a dog that is common and is known for being fierce.
对于为何选择小猎兔犬，康克林说到：“这是28年前，丹尼斯开始雕刻的第一种狗，而且它的商品一直是卖的最好的。”
Why a beagle? "it was the first breed of dog Dennis started carving 28 years ago and it remains a best-seller all this time," said Conklin.
大象像狗一样，喜欢有一个专一的主人，而且能够对主人有一种相当程度的私人感情。
Elephants like to have one master just as dogs do, and are capable of a considerable degree of personal affection.
但是那里只有一种我认为可以养的狗，毕尔格猎犬，没有更好的品种。
But there was only one breed I imagined owning, a beagle, and there weren't any available.
一旦人们研究出狗闻的气味类型和由哪种癌症发出的，就可以由此发明一种诊断的机器。
The idea is that, once they have worked out which odours dogs are detecting and which cancers emit them, a diagnostic machine could be developed.
随着时间的推移，写信给这些爱狗族小孩让我得到了一种奇特的满足感，这种感觉是我在接听办公电话时从未获得过的。
In time I found a strange satisfaction in writing back to these puppy-crazed children, one that I never got from answering the office phones.
这是狗是奥巴马的好朋友爱德华肯尼迪议员送给他的，爱德华肯尼迪议员说道这只狗对于奥巴马一家来说将会是一个完美的礼物，因为这种狗是一种说到做到和充满希望的动物。
The dog was a gift from close family friend Senator Edward Kennedy. He said the breed would be a " perfect fit for the Obama family", as the dogs have a " can-do and hopeful spirit".
2007年，美国食品和药品管理局批准了一种用于宠物狗治疗的药物，该药物与百忧解一样含有羟色胺重摄取抑制剂成分。
In 2007, the us Food and drug Administration licensed a drug containing the same serotonin-reuptake inhibitor as Prozac for use in dogs.
不过现在，这已经不再是问题了，来自荷兰的一位动物爱好者发明瞭一种狗啤酒。
Now, though, that's no longer the case, thanks to a Dutch animal lover who has created a beer especially for our canine chums.
这种狗是导盲犬，是一种经过特殊训练帮助盲人出门的动物。
This is a "seeing-eye dog", an animal specially trained to help the blind get about in public.
澳地利的研究者们周一报告说：狗能够察觉对自己不公平的处境并且表现出一种近似嫉妒的简单情绪。
LONDON (Reuters) - Dogs can sniff out unfair situations and show a simple emotion similar to envy or jealousy, Austrian researchers reported Monday.
他发现水狗的体型主要由一种叫做胰岛状生长因子1号决定的，这个发现也会同样适用于其他品种。
The size of water dogs, she found, is governed mainly by variations in a gene called insulin-like growth-factor 1—and that is probably true of other breeds as well.
熟能生巧，然而，一只狗越靠近人类越擅于“心灵感应”，这靠的其实是一种感觉的超意识。
Practice makes perfect, however, so the more a dog hangs around humans, the better he or she becomes at "canine telepathy, " which actually relies upon hyperawareness of the senses.
据说狗主人与他们的宠物狗看起来很相似——也许这种相似具有非常充分的理由，因为一种名叫自发性模仿的现象告诉我们，模仿人类的姿势似乎是犬类的天性。
Dog owners are said to resemble their pets - and perhaps with good reason. It seems dogs naturally match human gestures in a phenomenon known as automatic imitation.
有些人到杰克逊山洞去坐狗拉雪橇滑雪，狗拉雪橇滑雪就是游客坐在雪橇上，一群狗拉着雪橇在雪地上跑，这是众多享受传统山区景色方式的一种。
Some people go dog sledding in Jackson Hole. They get on a sled and are pulled by a team of dogs through the snow.
Lee的小组使用一种反转录病毒将荧光基因植入狗胚胎成纤维细胞中，但是他们并不能控制这种反转录病毒植入基因的位置。
Lee's team used a retrovirus to transfer the fluorescent gene to dog fibroblast cells, but they could not control where the virus inserted the gene.
Lee的小组使用一种反转录病毒将荧光基因植入狗胚胎成纤维细胞中，但是他们并不能控制这种反转录病毒植入基因的位置。
Lee's team used a retrovirus to transfer the fluorescent gene to dog fibroblast cells, but they could not control where the virus inserted the gene.
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